Better fuel mpg from western fuel than in the midwest?

Question

I was traveling and bought fuel in a remote area north of the grand canyon it gave me aprox. 80 mpg where as norm is only 20 mpg why?

Answer 1

That's practically impossible...did your car digitally tell you its mileage?  If so then it was messed up from the arizona heat...

Answer 2

you should move to the west...you may not have missed a fill up but you did miss writing it down

Answer 3

I really don't believe that at all.  You must have gotten your #s wrong.  Unless you're driving a motorcycle that gets really good gas mileage, there's no way (with current cars) to get 80 miles per gallon...especially if you usually get 20mpg.

Answer 4

The most common cause for this is failure to write down a fill up or two.

Actual experience is that cars tuned for mid western altitude will perform less well and give poorer mileage in higher elevations.

Mid west gas might have more ethanol which might account for a 5% reduction in mileage, but not a 4 fold change.

Answer 5

Fuel in the west is the same as the midwest.