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for Phillips 66® E85.

Frequently Asked Questions

Phillips 66® E85, also called flex fuel, is a blend of ethanol and gasoline designed for use only in flex-fuel vehicles. Ethanol is made from renewable resources generally derived from crops like corn and sugar cane. For any flex-fuel vehicle, this product can be considered a “drop-in” fuel (no engine modifications necessary).

Phillips 66® E85 fuel provides a reduction in some tailpipe emissions. For some flex-fuel vehicles, users may notice improvement in engine performance and power compared to gasoline.

Check your gas cap, fuel door or owner’s manual. Many flex-fuel vehicles have a distinct yellow gas cap, a sticker inside the fuel door, or a badge on the exterior that says “FFV” or “Flex Fuel.” Phillips 66® E85 is only intended for use in vehicles identified by the manufacturer as a flex-fuel vehicle.

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Phillips 66® E85 has a higher octane rating than premium gasoline. Higher octane allows for better engine performance and a smoother running engine.

Ethanol accounts for at least 80% of the final product.

*Compared to gasoline

Download the My Phillips 66® App and save 20¢* per gallon on your first fill-up.

My Phillips 66® App is safe and secure. And for a limited time, you can save 20¢* per gallon on your first fill-up when you download the My Phillips 66® App. Then continue saving 5¢* per gallon on every fill-up when you buy fuel with the My Phillips 66® App. Download today, setup your mobile wallet and spend less to get where you're going. Offer ends 12/31/23.

*20¢ is a combined savings of 5¢ everyday plus an extra 15¢ off per gallon for first time users (up to 30 gallons). Offer valid once for a new My Phillips 66® App user through 12/31/2023. Participating locations only. Can be combined with other offers. 5¢ everyday savings offer can only be applied once per transaction.