Guessing Game - Some questions about the new breed of motor oils necessary for the 07 diesel engines have been answered. Many remain frustratingly uncertain

摘要

What we do know about the new "proposed category 10" (PC-10) heavy duty oils currently in development to protect 2007 truck engines, is that they will be backwards compatible. So says Jim McGeehan, global manager for diesel engine oil technology at Chevron, and chairman of the ASTM (American Society of Testing and Materials) Heavy-Duty Engine Oil Classification Panel, the body responsible for putting new oil categories in place and which is made up of the diesel OEMs, all four additive suppliers, and the major oil companies. But what we don't know about PC-10 oils is still pretty much everything else: how much the new oils will cost, how they will impact oil change intervals, or even, for that matter, what API license name they will be marketed under. The obvious succeeding name to the current API CI-4 Plus oil category is API CJ-4, but "CJ" is trademarked by Jeep, so CK might end up the next best thing.