Gen 5 & 6 Problems/Service Issues/Troubleshooting
I have a 1999 Malibu LS with the 3.1L J-code V6 with about 157,000 miles on it. I am currently averaging about 16 MPG (give or take half an MPG), while getting about 23-24 on longer, mostly-highway driving journeys. Judging from what I see from other Malibu V6 owners on Fuelly (which I've...