1996 Pontiac Bonneville SE 3.8 mileage: 67,000. In the past month and a half, my mileage has gone from four hundred and fifty miles per whole tank to three hundred to three hundred and fifty per whole tank. I believe it is a fifteen to sixteen gallon tank. At first, I thought it was due to colder weather when I started getting about fifty miles less per tank. But now (mid December) I am suddenly getting one hundred to one hundred and thirty miles less per tank. What can I check for and what are some possible problems that might be causing this? Thanks!
have the same problem?
Friday, October 22nd, 2010 AT 10:01 PM