Gas mileage question

[travelover]

Have you shown reproducibility of the Costco results?

We need a double blind study.

 

[Bluetrekrider]

Ethanol content will indeed affect mileage. Some gasoline has 0% ethanol while others contain up to 10% in regular or premium grade gasoline. I doubt that the station delivery driver mistakenly put 85% ethanol in the tank but that will decrease your mileage by 4 mpg. In a more extreme example, my car is outfitted to burn 85% ethanol and while that mix will produce more power and higher octane, it burns faster and results in a decrease of 4 mpg. I calculated that it has to be 70 cents less in price than regular to break even; that rarely happens so I'm back to using regular.

 

[bld999]

Gasoline gallon equivalent - Wikipedia, the free encyclopedia


Here's a wiki that lays out btu content of various blends. Ethanol is much lower than pure gas.

 

[ERhoosier]

More on ethanol vs gas-

Ethanol

 

[Walt34]

If it only happened once and things returned to normal afterward I'd just chalk it up to an unknown aberration and let it go at that.

 

[Stanley]

Thanks for the information on Ethanol in our gasoline.

We will all be happy campers when 15% ethanol becomes common.

 

[scrinch]

Wind conditions were similar each way.

But maybe driving with the wind in one direction and against it in the other?

We need a double blind study.

As in the movie "The Scent of a Woman"?