'88 M6 with 118k I'd be interested to know the mileage of everyone's S38 engine. I'm interested in longevity. How long do these engines go before they need a rebuild? Is it as good as other bimmer engines? I had an '86 528e that went 260,000 before giving up the ghost. Will an M6 do that? I'm currently at 94k. What are the weaknesses in the S38, or maintenance issues to watch for?