I took my car in after 1,000 miles on it. Ive only had it 3 weeks and i took it in because i saw the bulletin on the M flash update. So i told them which it was doing was running ruff, and haveing a hard time starting. He said ok i'll look at it. Well an hour later he comes in and says well we fixed it. Your plugs were all fouled out. And he said they replaced them and updated the PCM. But the car still gets the same gas mileage and runs a little ruff once in a while. Has anyone else experienced this?????

 

it mayn't be simply from fuel... how is your oil level doing??