Why the gas milage drop
I would only run the high test every so often. Mostly a waste of money. I run a tank every so often when i do a hwy trip to give it clean gas without ethanol. The lower grade fuels can have up to 10%. If you want better fuel milage find a station that sells the lower grade fuels without ethanol. wmhersh72 you might need a tuneup. Plugs wires air and fuel filter. Also try a different station they might have changed there supplier for gas.
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