Bike Talk motorcycle forum

Last week I went on a ride from California to Arizona and back (about 1100 miles) and I made notes at each fuel stop of my mileage and gallons to fill up.
Upon calculating the mileage, I noticed that my mileage in California was averaging 36.4 mpg and in Arizona it was averaging 42.8 MPG, that's a 6.4 MPG increase!!
Does anyone know what would cause that kind of increase while I was in AZ?? Is there somthing different about the AZ gas? I used 91 octane at all fuel stops. I had about 5 fill ups in AZ and 7 in CA and consistantly the AZ tanks got me MPG of low 40's? Any ideas?

I'm feeling a bit ripped off from paying higher gas prices in CA and getting less MPG.

Thanks

SISK

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