- First Name
- Marty
- Joined
- Dec 19, 2020
- Threads
- 31
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- 1,805
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- 3,121
- Location
- North Carolina
- Vehicle(s)
- 2021 Ford Bronco Sport and 2004 Ford Escape AWD
- Banned
- #16
Let me see if I can get this right.91 for max horsepower and most of the time ethanol free for best mileage. Not much difference in price once you factor in the mpg with ethanol free 91. Win-win!
If I pay $2.90 a gallon for ethanol free as opposed to $2.05 my 27 mpg Baby Bronc will get 33 mpg ?
I really doubt that.
I did finally try a tank of premium fuel.
Felt no diff in power, even in sport mode.
Unless I mashed the gas harder dropping my avg mpg some...
Not science, only one try of a half tank but:
Tank of 87 octane. 26.1 avg mpg
Tank of real gas, 91 no eth, got me 26.3 avg mpg. But The roads were dryer meaning less rolling resistance during that fill up.
,
As. Forum group we owe it to ourselves to do a mileage thread based on octane and non ethanol vs ethenol.
In several of my older 4 and 6 cylinder smaller engine vehicles I saw no gain in mpg or felt better response with premium.
The slower flame propogation of higher octane that is simply more anti knock compound can help in very hot weather and or heavy loads as far as I can tell. A bit of this is in the owners manual....
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