E85 Fuel

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Feb 27, 2025 | 06:37 PM

defaria

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From: Phoenix, Arizona

E85 Fuel

Here in California, gas is expensive. While at the gas station, I noticed the E85 stuff. It was cheap. Now I'm sure many of you will poo-poo it but is it generally save to use with a C7?

Feb 27, 2025 | 06:53 PM

calvins

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From: Rotonda West, FL 2015 Z51 M7 3LT

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Can't help you. The only thing I've put in any of my 6 'Vettes has been Mobil 93 - I figure if I can afford the car, I should treat it the best that I can.

Feb 27, 2025 | 07:39 PM

kodpkd

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From: Loveland

NO,,,, The C7 can't use E85 unless it is modified.

Feb 27, 2025 | 08:21 PM

96GS#007

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From: Texas

Quote:

Originally Posted by defaria

Here in California, gas is expensive. While at the gas station, I noticed the E85 stuff. It was cheap. Now I'm sure many of you will poo-poo it but is it generally save to use with a C7?

You'll need to install a flex fuel sensor and have the car tuned to use it. With the sensor and the tune, it's safe to use and you pick up a little power.

Gas mileage goes down with E85 so that offsets some of the savings.

Feb 27, 2025 | 08:56 PM

Avanti

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Feb 27, 2025 | 11:54 PM

Vetteman Jack

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Quote:

Originally Posted by kodpkd

NO,,,, The C7 can't use E85 unless it is modified.

Do not use E85 on a stock car.

Feb 28, 2025 | 06:09 AM

StayinStock

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From: Charles Town WV

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Being that your in Cali its not going to be an option for you as it requires a tune and a flex fuel sensor. The tune calibration will trip you up when emissions roll around. As others have stated above, any fuel cost you saved would be ate right back up in loss of MPG... e85 requires way more fuel to burn at the same energy as 93.

Feb 28, 2025 | 10:39 AM

jaxcam02

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From: Northeast Fl

What I have found on my E85 tuned vehicles is about a 30% reduction in fuel mileage from 93. Basically the price of E85 has to be 30% lower than 93 to break even (however there are vast power gains with e85). So far 93 hasn't dropped enough in price for me for me to switch back.