Sorry to get off subject, but I hit 190K miles today on my '93 740i. It has the original Nikasil engine, and I drive it to work 60 miles every day. It is showing a slightly rough idle due to the leaking caused by the high sulfer content in North American gas. But hey, it started the rough idle business at 100,000...maybe I can still get it to 250-300K! Sorry I can't help with the original intent of this thread, since the '93 is a stagecoach compared to the new 7 series. Still, prefer my SL or the wife's E-Class over my 740.