I filled up last on the first of the year at the New Valero next to the Purple place in Eldorado hills. added 1/3 of a bottle of PS as directed and as usual.

I have never ever gotten this poor of mileage! 11.5 mpg is all I got!!

I recently fueled up at a 76 and my mileage has returned to normal 16.5-16.7mpg while towing.

I'm checking the filter today just to make sure.

Rick