Originally Posted By: stenerson
Will be more conservative now, I'll stick to about 8K.
One nice thing about Mobil 1 Extended Performance is that you have the assurance that the engineers and QA folks at XM were able to convince a gaggle of the most anal-retentive people in the world Universe... the legal department of a monied, multinational corporation... that it's safe enough to put an explicit "15,000 mile" claim right on the bottle. The guarantee says that it only covers normal service and not severe, with the usual definition of severe service spelled out. But you can bet that the engineers had to convince the lawyers that the oil could handle 15,000 miles of severe service, as well. Because of... well... the way typical car owners are. That fact speaks louder to me than a thousand used oil analysis on BITOG ever could.