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So update on my original question where I asked why I was getting 11 mpgs. I returned the tune to stock, and gas mileage is still horrid. Spark plugs, fuel filter, air filter, etc. have all been changed within the last 6 months so I'm not going to sweat the little details. Gas mileage dropped after I had my o/r X pipe installed and I remember seriously stretching the front sensors to go into the pipe. This may have damaged them though the car isn't throwing a code.
Would replacing the front O2's be the most obvious solution to solving my gas mileage dilemma?
Would replacing the front O2's be the most obvious solution to solving my gas mileage dilemma?