I recently moved from Phoenix to San Diego, and have noticed a 9 MPG decrease in the mileage I'm getting from my 2005 Ford Ranger (approx. 26 MPG in Arizona and now 17 MPG in Calif.). A local Ford dealership checked my truck and told me there's nothing wrong with it, and my driving style hasn't changed either. So the only thing I can figure out is that there are additives in the California gas that is adversely affecting my mileage. Any comments?
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