Knocking in engine, at times very
loud. Had to decarbon engine at 11000
miles. The problem has reoccured.
Uses 3 quarts of oil every 2000 miles.
Dealer said this is about normal???? I
have owned quite a few Cads, never had
this engine problem. I feel dealer has
not addressed this problem in a serious
manner. Other than that the car is
The new changes incorporated into the
Northstar engine appears to be a step
backward. I am sure they were just
trying to save a couple of bucks.