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Mpg and ethanol


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Just wondering if any of you have tried different grades of gas and with or without ethanol. I have noticed a difference of 2mpg or so (by the meter) on my 2012 Sierra 4.8 crew cab. At 60 in cruise with no ac I get 18.7 and with ethanol free I got 20.4. Its hard for md to do the calculations on a whole tank as my wife drives it and is a bit of a wild card. Just wondering if any of you have tried this. In my are chevron supreme and conoco 76 all grades are ethanol free.

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Yep, the 10% blend that is common throughout the US costs a good bit of MPG. I'd agree with a 2 mpg difference- when I was in school the dorms were on the CT/MA line and one had the E10 and one still used MTBE and the straight gas was about two MPG better if memory serves.

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Go get star-tron additive.. Its the best additive you,ll ever buy!! I have a thread about it in here.. you,ll get your lost mpg,s back

And feel like you picked up 10-15 HP, I run it in everything!

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  • 1 month later...
If I want power I'll run E85. Truck runs awesome on it but 12 mpg is lame. :lol:

 

 

Sent from my iPhone using Tapatalk

 

12? Try 10-11 :). Well worth it though

 

Been running E85 for 3 yrs straight

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12? Try 10-11 :). Well worth it though

 

Been running E85 for 3 yrs straight

 

12 was all highway. Mixed was closer to your numbers. Dune weekend was 8. lol

 

 

Sent from my iPhone using Tapatalk

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