PONTIAC BONNEVILLE ENGINE POOR MILEAGE

The Cars Runs Well But The Fuel Economy Has Dropped 100 Miles Per Tank. I Changed The Fuel Filter, Pcv Valve, Plugs (very Clean Old Ones...

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...