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WashingtonSB 62692025-2026 Regular SessionSenateWALLET

Modernizing the definition of motor fuel in the motor fuel quality act.

Sponsored By: Sharon Shewmake (Democratic)

Became Law

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Bill Overview

Analyzed Economic Effects

2 provisions identified: 0 benefits, 0 costs, 2 mixed.

Clearer diesel and dyed fuel rules

Beginning June 11, 2026, the law clarifies that diesel is "special fuel" under RCW 82.38.020. Dyed diesel must follow the federal dyeing rule in 26 C.F.R. 48.4082-1T as of October 24, 2005. Sellers and distributors must follow these definitions when selling diesel in Washington.

Updated definitions for motor and biofuels

Beginning June 11, 2026, the law updates which products count as motor fuel in Washington. Motor fuel includes any liquid or gas used to power vehicles on state roads. Alcohol fuel is alcohol not made from petroleum or natural gas, used alone or blended. Biodiesel must meet EPA fuel registration and ASTM standards. E85 must be about 75% to 85% ethanol and meet ASTM D5798. Renewable diesel must come from nonpetroleum sources and meet EPA Part 79 (2008) and ASTM D975. Ethanol blends may be sold only if the base fuel meets standards before mixing, or the final blend meets them after. Nonhazardous motor fuel means vehicle fuel that does not contain a hazardous liquid under RCW 19.122.

Sponsors & Cosponsors

Sponsor

  • Sharon Shewmake

    Democratic • Senate

Cosponsors

  • Marko Liias

    Democratic • Senate

Roll Call Votes

All Roll Calls

Yes: 191 • No: 0

Senate vote • 3/10/2026

Final Passage as Amended by the House

Yes: 49 • No: 0

House vote • 3/4/2026

Final Passage as Amended by the House

Yes: 94 • No: 0 • Other: 4

Senate vote • 2/10/2026

3rd Reading & Final Passage

Yes: 48 • No: 0 • Other: 1

Actions Timeline

  1. Effective date 6/11/2026.

    3/23/2026Senate

  2. Chapter 160, 2026 Laws.

    3/23/2026Senate

  3. Governor signed.

    3/23/2026legislature

  4. Delivered to Governor.

    3/12/2026legislature

  5. Speaker signed.

    3/11/2026legislature

  6. President signed.

    3/11/2026legislature

  7. Passed final passage; yeas, 49; nays, 0; absent, 0; excused, 0.

    3/10/2026Senate

  8. Senate concurred in House amendments.

    3/10/2026House

  9. Third reading, passed; yeas, 94; nays, 0; absent, 0; excused, 4.

    3/4/2026Senate

  10. Rules suspended. Placed on Third Reading.

    3/4/2026Senate

  11. Floor amendment(s) adopted.

    3/4/2026Senate

  12. Rules Committee relieved of further consideration. Placed on second reading.

    2/27/2026Senate

  13. Referred to Rules 2 Review.

    2/25/2026Senate

  14. ENVI - Majority; do pass.

    2/23/2026Senate

  15. ENVI - Executive action taken by committee.

    2/23/2026Senate

  16. First reading, referred to Environment & Energy.

    2/12/2026Senate

  17. Third reading, passed; yeas, 48; nays, 0; absent, 0; excused, 1.

    2/10/2026Senate

  18. Rules suspended. Placed on Third Reading.

    2/10/2026Senate

  19. 1st substitute bill substituted.

    2/10/2026Senate

  20. Placed on second reading by Rules Committee.

    2/6/2026Senate

  21. Passed to Rules Committee for second reading.

    2/4/2026Senate

  22. Minority; without recommendation.

    2/3/2026Senate

  23. ENET - Majority; 1st substitute bill be substituted, do pass.

    2/3/2026Senate

  24. First reading, referred to Environment, Energy & Technology.

    1/21/2026Senate

  25. Introduced

    1/21/2026Senate

Bill Text

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