Oregon Laws and Incentives

Listed below are the summaries of all current Oregon laws, incentives, regulations, funding opportunities, and other initiatives related to alternative fuels and vehicles, advanced technologies, or air quality. You can go directly to summaries of:

State Incentives

Plug-In Electric Vehicle (PEV) Rebate

The Clean Vehicle Rebate Program provides rebates to Oregon residents, businesses, non-profit organizations, and government agencies for the purchase or lease of PEVs. New PEVs with a battery capacity greater than 10 kilowatt-hours (kWh) are eligible for a rebate of $2,500 and new PEVs with a battery capacity of less than 10 kWh are eligible for a rebate of $1,500. Oregon residents that meet low or moderate household income requirements are eligible for rebates of $2,500 for the purchase or lease of used all-electric vehicles (EVs) and $5,000 for the purchase or lease of new EVs. New zero-emission electric motorcycles are eligible for a rebate of $750. For more information, see the Clean Vehicle Rebate Program website. (Reference Oregon Revised Statutes 468.148-468.157)

Alternative Fuel Loans

The Oregon Department of Energy administers the Small-Scale Local Energy Loan Program which offers low-interest loans for qualified projects. Eligible alternative fuel projects include fuel production facilities, dedicated feedstock production, fueling infrastructure, and fleet vehicles. Loan recipients must complete a loan application and pay a loan application fee. The Energy Loan Program is not currently accepting new loan applications (verified February 2020). For more information, including application forms and interest rate and fee information, see the Energy Loan Program website. (Reference Oregon Revised Statutes 470)

Clean School Bus Grants

The Oregon Department of Environmental Quality must use funds awarded to Oregon through the Volkswagen (VW) Environmental Mitigation Trust and deposited in the Clean Diesel Engine Fund, to award grants to owners and operators of at least 450 school buses powered by diesel engines. Eligible vehicles include buses that have at least three years of remaining useful life. Grants will be available for 30%, up to $50,000, for the purchase of a new bus or up to 100% of the cost to retrofit a school bus with emissions-reducing parts or technology that reduce diesel particulate matter emissions by at least 85%. Any money not expended under this Clean Diesel Engine Fund will fund grants for the reduction of diesel engine emissions as matching funds under the Diesel Emissions Reduction Act program. For more information, see the VW Settlement website. (Reference House Bill 2007, 2019, and Oregon Revised Statutes 468A.795 - 468A.803)

Biofuels Production Property Tax Exemption

Property used to produce biofuels, including ethanol and biodiesel, may be eligible for a property tax exemption if it is located in a designated Rural Renewable Energy Development Zone. The Oregon Business Development Department must receive and approve an application from a qualified rural area to designate the area as a Rural Renewable Energy Development Zone. For more information, see the Business Oregon Renewable Energy website. (Reference Oregon Revised Statutes 285C.350 - 285C.370)

Alternative Fuel Technology Weight Exemption

A vehicle equipped with a fully functional idle reduction system designed to reduce fuel use and emissions from engine idling may exceed the maximum weight limitations by up to 550 pounds (lbs.) to accommodate the added weight of the idle reduction technology. Any natural gas vehicle or plug-in electric vehicle may exceed the limits by up to 2,000 lbs. (Reference Oregon Revised Statutes 818.030)

Pollution Control Equipment Exemption

Dedicated original equipment manufacturer natural gas vehicles and all-electric vehicles are not required to be equipped with a certified pollution control system. (Reference Oregon Revised Statutes 815.300)

Utility/Private Incentives

Electric Vehicle Supply Equipment (EVSE) Rebates - Eugene Water & Electric Board (EWEB)

EWEB offers rebates for residential and commercial customers to install Level 2 EVSE. Eligible residential customers may receive up to $500, and eligible commercial customers may receive up to $1,000. For more information, including application details, visit the EWEB Electric Vehicle Incentives and Rebates website.

Non-Residential Electric Vehicle Supply Equipment (EVSE) Grants - Pacific Power

Pacific Power is offering non-residential customers quarterly grants for up to 100% of eligible purchase and installation costs of EVSE. Twenty-five percent of funds will be earmarked for workplace charging and fleet electrification projects. Additional requirements may apply. For more information, visit the Pacific Power Charging Station Grants website.

Plug-In Electric Vehicle (PEV) Registration Incentive - Emerald People’s Utility District (EPUD)

EPUD customers are eligible for a $100 incentive to register their new or used PEV with the Oregon Department of Motor Vehicles. New or used PEVs with at least 2 kilowatt-hours of on-board battery capacity qualify. For more information, including the application, visit the EPUD website.

Electric Vehicle Supply Equipment (EVSE) Installation Rebate - Central Lincoln

Central Lincoln offers residential and commercial customers a one-time rebate of $250 to purchase a Level 2 EVSE. Eligible EVSE must be purchased on or after July 1, 2018. For more information, including the application, please visit the Central Lincoln website.

Plug-in Electric Vehicle (PEV) Charging Rate Incentive - Portland General Electric (PGE)

PGE offers a discounted time-of-use (TOU) electricity rate for customers with a PEV. The TOU rate is for charging during the off-peak period. Additional terms and conditions apply. For more information, see the PGE Cost Savings website.

Laws and Regulations

Diesel Emissions Reductions Registration Requirement

The Oregon Department of Motor Vehicles (ODMV) will phase out registrations for certain medium-duty (MD) and heavy-duty (HD) trucks powered by diesel engines in Multnomah, Clackamas, or Washington Counties unless vehicles have been retrofitted or repowered with approved technologies. ODMV will no longer issue certificates of titles on or after the following dates:

DateVehicle and model year
January 1, 2023
  • MD and HD trucks powered by a model year (MY) 1996 or older diesel engine
January 1, 2029
  • MD trucks powered by a MY 2009 or older diesel engine
  • HD truck owned by a public body powered by a MY 2009 or older engine
  • HD truck not owned by a public body powered by a MY 2006 or older engine

The Oregon Department of Transportation must submit an annual report to the Legislative Assembly on the effects of the titling restrictions of MD and HD diesel trucks annually by September 15.

(Reference Oregon Revised Statutes 468A.19)

Diesel Emissions Reduction Task Force

A task force is established to consider funding strategies to support businesses in reducing diesel emissions, identify barriers to small contractor participation in public works contracts due to clean diesel engine requirements, and develop incentives to phase-out medium-duty and heavy-duty diesel-powered trucks statewide. The task force is to be comprised of both members of the public and members of the Oregon Legislature. (Reference Oregon Revised Statutes 468A.19)

Support for Renewable Natural Gas (RNG)

The Oregon Public Utility Commission (PUC) will develop rules for RNG distribution programs for both small and large utilities. Rules must include reporting requirement guidelines and a rate recovery costs process. The PUC must establish rate caps for small natural gas utilities.

The PUC has established voluntary RNG target distribution goals for large utilities that participate in the RNG program under the following schedule:

Calendar YearsPercent RNG

(Reference Oregon Oregon Revised Statutes 757.396)

Support for Autonomous Vehicles

The Oregon Department of Transportation (ODOT) is the lead agency responsible for coordination of autonomous vehicle (AV) program and policies. ODOT established a Task Force on AVs (Task Force) to develop recommendations for AV legislation to address licensing and registration, law enforcement and accident reporting, cybersecurity, and insurance and liability. The Task Force submitted a report tto the Legislative Assembly on proposed recommendations, and a report on the potential long-term effect of AVs. (Reference Oregon Law 94, 2018)

Zero Emission Vehicle (ZEV) Deployment

The Oregon Department of Energy (ODOE) will monitor state ZEV adoption goal progress for registered vehicles, new vehicle purchases, and the state fleet. The state established the following goals for registered vehicles

  • By 2020, 50,000 registered vehicles will be ZEV;
  • By 2025, 250,000 registered vehicles with be ZEV; and
  • By 2030, 25% of vehicles registered will be ZEV.

In addition, the state established the following goals for new vehicle purchases:

  • By 2030, 50% of all new vehicle purchases will be ZEV; and
  • By 2035, 90% of all new vehicle purchases will be ZEV.

By 2029, all state fleet vehicles should be ZEVs. ODOE must submit a biannual report by September 15 on the status of ZEV adoption. If ZEV adoption goals are not met, ODOE report must include strategies for increased adoption rates.

(Reference Oregon Revised Statutes 283.327 and 283.398)

Support for Plug-In Electric Vehicle (PEV) Adoption

In order to support the state goal of at least 50,000 PEVs registered and operating in Oregon by 2020, the Zero-Emission Vehicle Working Group (Working Group) will develop goals and progress metrics for PEV adoption. The Working Group will include representatives from the Departments of Administrative Services, Energy, Transportation, and Environmental Quality, and the Oregon Public Utility Commission. The Working Group will aim to remove barriers to PEVs and PEV charging stations and share information about their efforts with the public. More information can be found on the Go Electric Oregon website. (Reference Executive Order 17-21, 2017)

Volkswagen Settlement Allocation

The Department Environmental Quality (DEQ), with the Oregon Department of Transportation (ODOT), Oregon Department of Energy (ODOE), and Oregon Health Authority Public Health Division, engaged stakeholders and received public comments to inform the development of a plan to leverage up to 15% of the Volkswagen Mitigation Fund to support vehicle electrification. The plan includes the development and maintenance of plug-in electric vehicle charging stations, with a focus on rural and low-income communities.

ODOT, with ODOE, DEQ, the Public Utility Commission, and local governments, must develop proposals for future 30-month investment periods of Electrify America's Zero-Emission Vehicle Investment Plan. More information can be found on the Go Electric Oregon website. (Reference Executive Order 17-21, 2017)

Mandatory Electric Vehicle Supply Equipment (EVSE) Building Standards

The Oregon Department of Business and Consumer Services, Building Code Division, must amend the state building code to require that all newly constructed residential and commercial building parking structures can support the installation of at least one level 2 EVSE by October 1, 2022. (Reference Executive Order 17-21, 2017)

Establishment of Recognition Programs for Plug-In Electric Vehicle (PEV) Adoption

The Oregon Department of Energy (ODOE) must design and establish Governor's Awards for automobile dealerships to encourage sales of PEVs. ODOE must also design and establish Governor's Awards for businesses and organizations that support PEV adoption through installing charging infrastructure and using PEVs in their fleets. More information, including nomination forms, can be found on the Go Electric Oregon website. (Reference Executive Order 17-21, 2017)

Support for Zero-Emission Buses

The Oregon Department of Energy (ODOE), with the Oregon Department of Transportation (ODOT), Public Utility Commission (PUC), Department of Environmental Quality (DEQ), and the Department of Education, must develop tools and provide assistance to school districts about using zero-emission bus options when replacing school buses.

ODOT, with ODOE, PUC, and DEQ, must develop tools and best practices to help transit agencies when making decisions about using zero-emission buses in transit fleets. ODOT must also work with transit agencies, ODOE, DEQ, and the Oregon Health Authority Public Health Division to access the environmental, public health, and financial benefits of an accelerated transition to zero-emission buses.

(Reference Executive Order 17-21, 2017)

Plug-In Electric Vehicle and Vehicle Efficiency Fees

All-electric vehicle (EV) owners must pay an annual fee of $110 or a per-mile road use fee, administered by the OReGo program. Beginning January 1, 2022, EV owners must pay a fee of $115. Medium-speed EV owners must pay an annual fee of $58. All other hybrid vehicles must pay an annual fee in the following amounts:

Vehicle EfficiencyJanuary 1, 2020 through December 31, 2021After December 31, 2021
Vehicles with a rating of 0-19 miles per gallon (mpg)$18$20
Vehicles with a rating of 20-39 mpg$23$25
Vehicles with a rating of 40 mpg or greater$33$35

The per-mile road use fee, as an alternative to the annual fees, is determined by the schedule below:

Calendar YearFee per Mile
2022$0.019 per mile

Drivers with electric vehicles or vehicles with ratings over 40 mpg are exempt from additional registration fees if they enroll in the OReGo program. For more information, including how to apply, visit the OReGo program website.These fees are in addition to standard registration fees.

(Reference Oregon Revised Statutes 803.420-803.422)

State Agency Electric Vehicle Supply Equipment (EVSE) Installation

State agencies may install publicly-accessible EVSE on their premises or contract with a vendor to do so. The Oregon Department of Administrative Services (DAS) will establish criteria to determine the appropriate number of locations for EVSE at each agency. A state agency may establish and adjust a uniform price for charging, provided that the price recovers, to the extent practicable, the cost of operating the EVSE and does not exceed 110% of the average market price for the use of public EVSE. DAS will report to the Legislative Assembly on the number, cost, and utilization of EVSE installed by state agencies by February 2019, February 2021, and February 2023.

DAS must add PEV charging capacity for employee and public visitor parking lots, develop contracts to procure and install charging infrastructure, and incorporate PEV charging as a tenant improvement for state-leased buildings.

(Reference Oregon Law 90, 2018, Executive Order 17-21, 2017, and Oregon Revised Statutes 276.255)

Transportation Electrification Acceleration Programs

The Oregon Public Utility Commission must direct electric utilities to file applications for programs to accelerate transportation electrification. Eligible programs include investments in or customer rebates for electric vehicle supply equipment (EVSE). Among other criteria, programs must stimulate innovation, competition, and customer choice in EVSE and plug-in electric vehicle (PEV) charging.

Additionally, the Oregon Department of Energy (ODOE) must engage with publicly and investor-owned utilities on how to improve transportation electrification plans and increase PEV adoption in their service territories. ODOE must also provide the utilities with technical assistance on how to accommodate increased electric system loads from PEVs.

(Reference Executive Order 17-21, 2017, and Oregon Revised Statues 757.357)

Electricity Provider and Plug-In Electric Vehicle (PEV) Charging Rate Regulations

Regulated electric utility tariffs must explicitly permit customers to resell electricity for use as a motor fuel, as long as the entity is not considered a public utility as defined in Oregon Revised Statutes 757.005 and does not provide any utility service. Additionally, each regulated electric utility must provide customers with a choice of flat rate or time of use electricity rates specific to PEV owners. Finally, an investor-owned utility can own and operate PEV charging equipment using its own funds or petition the Oregon Public Utilities Commission for rate recovery. (Reference Public Utility Commission of Oregon Order No. 12-013, 2012)

Rented Commercial Property Electric Vehicle Supply Equipment (EVSE) Installations

The tenant of a commercial space may submit an application to install EVSE for the use of the tenant, employees of the tenant, and customers of the tenant. Unless the premises does not have at least one parking space per rental unit, the landlord must approve a completed application no more than 60 days after the tenant submits the application. In the absence of a different tenant-landlord agreement, the EVSE will be personal property of the tenant and the tenant is responsible for all costs associated with installation and use of the EVSE. The tenant is responsible for maintaining a renter's liability insurance policy of at least $100,000. Upon the termination of the rental agreement, the landlord may require the tenant to remove the charging station and restore the premises. Additional requirements and restrictions apply. (Reference Oregon Revised Statutes 90.462)

Planned Community and Condominium Electric Vehicle Supply Equipment (EVSE) Installations

The owner of a lot in a planned community or unit in a condominium may submit an application to install EVSE for their personal use in a parking space subject to the exclusive use of the owner. The homeowners association must approve a complete application within 60 days. The owner is responsible for all costs associated with the EVSE installation and use, must disclose the existence of the EVSE and related responsibilities to a prospective buyer, and must ensure that the infrastructure meets insurance and safety requirements. EVSE installed under these regulations on or before June 4, 2015, is considered to be the personal property of the lot or unit owner with which the EVSE is associated, unless the owner and homeowners association have negotiated a different outcome. Additional requirements and restrictions apply. (Reference Oregon Revised Statutes 94.762 and 100.627)

Alternative Fuel Vehicle (AFV) Parking Space Regulation

An individual is not allowed to park a motor vehicle within any parking space specifically designated for public parking and fueling of AFVs unless the motor vehicle is an AFV fueled by electricity, natural gas, methanol, propane, gasoline blended with at least 85% ethanol (E85), or other fuel the Oregon Department of Energy approves. Eligible AFVs must also be in the process of fueling or charging to park in the space. A person found responsible for a violation is subject to traffic violation penalties. (Reference Oregon Revised Statutes 811.587)

Zero Emission Vehicle (ZEV) Deployment Support

Oregon joined California, Connecticut, Maryland, Massachusetts, New Jersey, New York, Rhode Island, and Vermont in signing a memorandum of understanding (MOU) to support the deployment of ZEVs through involvement in a ZEV Program Implementation Task Force (Task Force). In May 2014, the Task Force published a ZEV Action Plan (Plan) identifying 11 priority actions to accomplish the goals of the MOU, including deploying at least 3.3 million ZEVs and adequate fueling infrastructure within the signatory states by 2025. The Plan also includes a research agenda to inform future actions. On an annual basis, each state must report on the number of registered ZEVs, the number of public electric vehicle supply equipment (EVSE) and hydrogen fueling stations, and available information regarding workplace fueling for ZEVs.

In June 2018, the Task Force published a new ZEV Action Plan for 2018-2021. Building on the 2014 Action Plan, the 2018 Action Plan makes recommendations for states and other key partners in five priority areas:

  • Raising consumer awareness and interest in electric vehicle technology;
  • Building out a reliable and convenient residential, workplace and public charging/fueling infrastructure network;
  • Continuing and improving access to consumer purchase and non-financial incentives;
  • Expanding public and private sector fleet adoption; and
  • Supporting dealership efforts to increase ZEV sales.

For more information, see the Multi-State ZEV Task Force website.

Clean Transportation Fuel Standards

The Oregon Department of Environmental Quality (DEQ) administers the Oregon Clean Fuels Program (Program), which requires fuel producers and importers to register, keep records of, and report the volumes and carbon intensities of the fuels they provide in Oregon. Phase 2 of the Program, implemented in 2016, requires fuel suppliers to reduce the carbon content of transportation fuels.

In 2020, a new goal was implemented to reduce the carbon content of transportation fuels by 20% below 2015 levels by 2030, and 25% below 2015 levels by 2035.

DEQ must conduct rulemaking for the Program to support greater plug-in electric vehicle (PEV) adoption. DEQ must also develop a method to aggregate and monetize all eligible PEV credits in the Program to assist in achieving the state goal of 50,000 registered PEVs in Oregon by 2020. For more information, see the DEQ Oregon Clean Fuels Program website.

(Reference Executive Order 20-04, 2020, Oregon Revised Statutes 468A.266, and Oregon Administrative Rules 340-253)

Renewable Fuels Mandate

All gasoline sold in the state must be blended with 10% ethanol (E10). Gasoline with an octane rating of 91 or above is exempt from this mandate, as is gasoline sold for use in certain non-road applications. Gasoline that contains at least 9.2% agriculturally derived ethanol that meets ASTM specification D4806 complies with the mandate. For the purpose of the mandate, ethanol must meet ASTM specification D4806. The governor may suspend the renewable fuels mandate for ethanol if the Oregon Department of Energy finds that a sufficient amount of ethanol is not available.

All diesel fuel sold in the state must be blended with at least 5% biodiesel (B5). For the purpose of this mandate, biodiesel is defined as a motor vehicle fuel derived from vegetable oil, animal fat, or other non-petroleum resources, that is designated as B100 and complies with ASTM specification D6751. Renewable diesel qualifies as a substitute for biodiesel in the blending requirement. In addition, diesel fuel blends sold between October 1 and February 28 may contain additives to prevent congealing or gelling. At any time, the Oregon Department of Energy may request a certificate of fuel analysis for biodiesel sold at any non-retail and wholesale biodiesel dealer.

(Reference Oregon Revised Statutes 646.913 - 646.923 and Oregon Administrative Rules 603-027-0410 and 603-027-0420)

Propane License Requirement

Any individual or business doing propane work in Oregon must obtain a license from the Oregon Office of State Fire Marshal. For additional information on license types, see the Liquefied Petroleum Gas website. (Reference Oregon Revised Statutes 480.432)

Commercial Vehicle Idle Reduction Requirement

A driver of a commercial vehicle may not idle the engine for more than five minutes in any sixty-minute period, unless the vehicle is using an auxiliary power unit, generator set, cargo temperature control unit, or other idle reduction technology that maintains heat or air conditioning or provides electrical power. Exceptions apply in certain situations and for certain vehicles. (Reference Oregon Revised Statutes 825.605 and 825.610)

Biodiesel Quality Testing Procedures

Each biodiesel or other renewable diesel producer, distributor, or importer must retain the certificate of analysis for each batch or production lot of B100 sold or delivered in the state for at least one year. The Oregon Department of Agriculture (ODA) or authorized agents may examine these records as necessary. The ODA or authorized agents may also perform on-site testing or obtain samples of biodiesel or other renewable diesel from any producer, bulk facility, or retail location that sells, distributes, transports, hauls, delivers, or stores biodiesel or other renewable diesel. The related testing cost is the responsibility of the business providing the sample. (Reference Oregon Revised Statutes 646.923)

Biofuels Program Impact Studies

The Oregon Department of Energy (ODOE) must conduct periodic impact studies related to the biofuels industry in the state. These studies should evaluate such criteria as: jobs created; current and projected feedstock availability; amount of biofuels blends produced and consumed in the state; cost comparison of biofuels blends and petroleum fuel; environmental impacts; and the extent to which Oregon producers import biofuels or biofuels feedstocks from outside the state. ODOE issued the first Biofuels Impact Study in 2010 and will conduct a study every two years through January 1, 2025. (Reference Oregon Revised Statutes 469B.400)

Zero Emission Vehicle (ZEV) Sales Requirements and Low Emission Vehicle (LEV) Standards

Under the Oregon LEV Program, all new passenger cars, light-duty trucks, and medium-duty vehicles sold, leased, licensed, or delivered for sale in the state must meet California motor vehicle emissions and compliance requirements specified in Title 13 of the California Code of Regulations. Exemptions may apply. Manufacturers must meet the greenhouse gas emissions standard and the ZEV production and sales requirements. The Oregon Department of Environmental Quality (DEQ) must work with the Environmental Quality Commission to maintain consistency with California's zero ZEV regulation, including any ZEV sales requirement increases. DEQ must also work with the Oregon Department of Justice and take appropriate steps to retain California's exemption for vehicle standards that are more protective of air quality under the Federal Clean Air Act. For more information, see the Oregon Clean Car Standards website. (Reference Executive Order 17-21, 2017, Oregon Revised Statutes 468A.360, and Oregon Administrative Rules 340-257)

Alternative Fuel Vehicle Acquisition and Fuel Use Requirements

All state agencies must purchase or lease zero-emission vehicles (ZEVs), including all-electric, plug-in hybrid electric, or hydrogen fuel cell vehicles, for at least 25% of new state light-duty vehicles to the maximum extent possible.

If ZEVs are not feasible, the state agency may purchase or lease AFVs and use alternative fuels to operate those vehicles, except in regions where it is not economically or logistically possible to fuel an AFV. Each state agency must develop and report a greenhouse gas reduction baseline and annual reduction targets to the Oregon Department of Administrative Services (DAS). Reports to DAS must include the number of purchases or leases of ZEVs, AFVs, and AFV conversions and the quantity of each type of alternative fuel used annually by state agency fleets. By September 15, 2020, DAS must develop a ZEV procurement plan to reduce costs for state agency ZEV purchases.

(Reference Executive Order 20-04, 2020, and Oregon Revised Statutes 283.327, 283.337, and 267.030)

State Emissions Reductions and Reporting Requirements

Oregon will pursue transportation electrification as part of greenhouse gas emissions reduction targets of at least 45% below 1990 levels by 2035, and at least 80% below 1990 levels by 2050. Select state agencies must report actions to reduce emissions annually. In consultation with appropriate state agencies, the Oregon Department of Transportation must submit a report to the governor on statewide transportation electrification infrastructure analysis by June 30, 2021. Additional requirements apply. (Reference Executive Order 20-04, 2020)

Low-Speed Vehicle and Medium-Speed Electric Vehicle (EV) Access to Roadways

A low-speed vehicle is defined as a four-wheeled motor vehicle capable of reaching speeds of more than 20 miles per hour (mph) but not more than 25 mph. A low-speed vehicle may not operate on a highway that has a posted speed limit of more than 35 mph. A medium-speed EV is defined as a four-wheeled electric motor vehicle that is equipped with a roll cage or a crushproof body design and is capable of reaching speeds of up to 35 mph. A medium-speed EV may not operate on a highway that has a posted speed limit of more than 45 mph. A city or county may adopt ordinances that allow the operation of low-speed vehicles or medium-speed EVs on city streets or county roads that have posted speed limits greater than 35 mph and 45 mph, respectively. Low-speed vehicles and medium-speed EVs must comply with certain standards contained in Title 49 of the U.S. Code of Federal Regulations, section 571.500. (Reference Oregon Administrative Rules 737-010-0010, and Oregon Revised Statutes 801.331, 801.341, 811.512, and 811.513)

Alternative Fuel Excise Tax

Compressed natural gas motor fuel is subject to the state fuel excise tax at the rate of $0.34 per 120 cubic feet, measured at 14.73 pounds per square inch and 60 degrees Fahrenheit. Propane motor fuel is subject to the excise tax $0.34 per 1.3 gallons at 60 degrees Fahrenheit. (Reference Oregon Revised Statutes 319.530)