ABSTRACT
Crankcase engine oils are the most recognizable lubricants in the automotive area. Both the individual and commercial consumer equate their vehicle lubrication with the engine oil. Millions in advertising budget are spent worldwide to promote specific brands in this area. The engines themselves and the crankcase lubricants protecting them have been upgraded over the last five decades such that engine life for gasoline passenger cars and heavy-duty diesel trucks are longer than ever before.
