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.
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.
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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