Sounds like blow by, a condition where the cylinder pressure escapes passed the rings into the crankcase. Caused all sort of havoc with an old Chevy I had, didn't pass smog and horrible mileage. Do a leak down test on the cylinders, see which one or two are bad.


1987 Raider - Roxy
1988 Mighty Max 2.6L Turbo - Pearl
1997 Mountaineer V8 - Freddy
2000 Excursion V10 - Freya