Knowledge Hub
Everything about
ethanol-free gas.
Why ethanol damages engines, how the federal mandate works, what E0 and E15 mean, and where to find pure gasoline near you.
Policy alert
EPA's Hidden 37-Cent-a-Gallon Gas Tax
EPA's record 2026 biofuel mandate now adds about 37 cents to every gallon of gasoline and diesel. That's more than double the federal gas tax, and it never shows up on your receipt.
The case against ethanol
Ethanol in Your Gas Tank Is a Bad Deal
Two decades of the Renewable Fuel Standard — what it costs you, what it damages, and why it survives.
State spotlight
Why Is Ethanol-Free Gas So Hard to Find in California?
CARB rules, the MTBE ban, and the new E15 law — why pure gas vanished from California pumps, and how to protect your equipment anyway.
E15 explained
E15 Is Bad for Your Engine
The EPA approved 15% ethanol blends year-round. Here's what that actually means for your car, boat, and small engines.
The basics
Ethanol in Gasoline: What It Is and Why It's There
A plain-English explainer on why ethanol gets blended into American gasoline and what it does once it's there.
Policy
The Renewable Fuel Standard
The federal mandate that put ethanol in every tank. How it works, who benefits, and why it's still around.
Fuel science
What Is Gasoline?
Octane ratings, refining, additives, and what separates premium from regular — and both from E0.
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