2020 Yukon Denali..Fuel miles per gallon

[swathdiver]

I have to double check but believe the 6.2’s are rated for premium. I only use premium in mine cause it gets 1-2 MPGs better with it and seems smoother during hard acceleration.


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We've seen on these pages lots of cracked pistons and rings from fellas who did not run premium high octane fuel in their 6.2s. the 5.3 DI motors as Gary has proven, do not really benefit from running higher octane fuels gas mileage wise. The FlexFuel DI motors make 25 more horsepower on E85 though.

 

[GTNator]

Last night I got 23 MPGs for about 130 miles, speed was 65-75MPH. (6.2l powerhouse)




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