Small world, I have a 87 560sel and go between Fairfax VA and Cape Cod Ma, so i know your situation. I know this reply is about a year after you last posted on this but I am wondering, for a 560sel, what if any is a expected amount of oil usage between 3k or 4k mile oil changes? And i will add that 99% of the driving is stop and go heavy traffic.

Thank you.