Is it normal to have a little bit of oil on the plug where it screws into the head? The mechanic said it was normal and that the rings did not need to be changed. I'll have him do a compressions check and post the results. The gas mileage and lack of power is what worries me the most. I drove 33 miles in total this past weekend(city driving) and used up a quarter tank. I think using up a quarter tank to drive 33 miles is waaaay too much fuel. What gas mileage should i shoot for since Dennis said 20 MPG was too high for the caprice?