I have a great opportunity to purchase a cherry one-owner 1998 740iL with 45,000 miles on it. The manual says it needs 91 octane. I have two questions:
Do I really need to run 91 octane? My Pathfinder runs great on an 89-octane 10% ethanol blend.
Whether I run 89 or 91, will I see a reduction in performance or smoothness with these blends?
have the same problem?
Tuesday, November 20th, 2007 AT 4:35 PM