This sounds like a worn out motor, oil rings, valve guides? And perhaps main bearings?
Look to see if the back of your car has oil residue, look for smoke at start up and acceleration.
I am not a pro mechanic but this is my thinking based on your info.
I have heard of oil being sucked into the break booster but not that much.
Look for oil in the coolant, were this the case you should still see some sign of oil spill.
Friday, October 31st, 2008 AT 11:25 AM