Fuel Type

Deerebilt1 · Post by **Deerebilt1** » Thu Sep 22, 2016 8:50 pm

Have. '16 Silverado LT Z71 Crew Cab 5.3 6AT. I drive for mileage and have a V8. I shut off DoD that's all good. I drive mostly in town. For best mileage and performance. Do I give it a 87 Tune and run 87 Ethanol. Or a 91/ Diablo tune and run 91 Alcohol Free. Using Top Tier fuel from Cenex.

Post by **mikel** » Fri Sep 23, 2016 8:18 am

For best performance, use the highest octane fuel you can find with the Diablo tune.

techntrek · Post by **techntrek** » Wed Sep 28, 2016 5:34 pm

Try all of the tunes. I found my best mpgs using the 87 tune, better than the mpg tune.

Deerebilt1 · Post by **Deerebilt1** » Wed Sep 28, 2016 8:50 pm

techntrek wrote:Try all of the tunes. I found my best mpgs using the 87 tune, better than the mpg tune.

With what grade of fuel. My choices here are 87 w/Ethanol or 91 Straight Gas.

Fuel Type

Fuel Type

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Re: Fuel Type