I was averaging about 22-24 MPG, mostly city and some highway driving. I normally fill up at a BP Amocco. I recently started using Speedway (Contains 10% Ethenol), since it was closer and the gas was the cheapest I found. After 2 fillups (not all the way full), I was getting about 16-19 MPG. At that time, I also removed the silencer (the white piece). At any time, did I drive too hard to get such low mileage. So to eliminate the possibilities, I put the silencer back on and filled up with gas from another station, which did not state their gas contained any Ethenol. So far, I am getting my normal good MPG of 22-24.
I do not think the removal of the silencer or not filling the tank all the way full caused the low mileage, but the fuel containing Ethanol. I thought I remembered reading fuels containing ethenol would cause such low mileage.
I will continue this experiment of using fuel not containing any ethenol/methenol. I will also remove the silencer again next week just to make sure my experiment is stable. I do not want to change too many factors.
Just my 2 cents
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<b>\'04 PT GT Graphite Metalic w/Autostick: </b> Stage1, BTG Strut Tower Brace, Eibach Anti-Sway Bars, Airaid CAI, Mopar 2.5\" Dual Cat-Back (D: 14.48@93 - A/S: 14.56@90) <i>...more mods at
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