I know there has to be a logical explanation for this. Some of my family and friends live in NJ and I live in NY. I frequently gas up in NJ (avg $.020 cheaper) and ALWAYS get 4-5 mpg better than when I fill up in NY. At the pumps in NY it says 10% methanol. Can this be the reason why my mileage is suffering? If so, why the heck does NY have to have a different formula that LOWERS gas mileage? That makes no sense to me. Any comments would be GREATLY appreciated.