Oil pressre and a turbo...
Also there was a bulletin issued by GM in regards to Mobil 1 oil and oils that have the "energy conserving" label on the bottle. Do not use such oils in lifter and pushrod engines. Including late style roller lifters. Royal Purple served me well in the past.
Also there was a bulletin issued by GM in regards to Mobil 1 oil and oils that have the "energy conserving" label on the bottle. Do not use such oils in lifter and pushrod engines. Including late style roller lifters. Royal Purple served me well in the past.


