ACDelco Crankcase Cleaner effectively cleans sludge and varnish build-up from engine oil galleries and passages.
Directions:Add entire container contents to the engine oil just before draining. Allow the engine to run at idle for 10-20 minutes. drain crankcase oil and install new engine oil filter. Do not drive a vehicle with Crankcase cleaner in the crankcase.
Part Number:88863932
Application:Applicable to All