[Zeke]

Yeh, but the coincidence of the car's change in performance right after fill-up can't be ignored. I'd siphon the gas out and refill and see. If the gas had moisture, a little alcohol added will fix that. I still have a habit of passing stations receiving gas from a tanker truck; don't know if that was the case. The filter should be looked at and/or replaced. Slipped timing iis the next prpbable cause. Hope it isn't any more than that.