mobile 1 0W40 analysis results 8700 mile OCI, 00 boxster s

[AUDIOGUY]

When I owned BMWs, I always wondered if they tauted longer than average oil change intervals because so many of their cars had BMW paid maintenance packages. You would figure one oil change per year per car is much less costly than two.

Just a thought.

I change my oil once a year in the summer at about 7k mile interval.

[John V]

Obviously owners are free to do as they please with regard to oil changes. My oil reports don't support the notion of running the oil longer than 10k with my driving.

The factory only cares about you getting through the warranty period. Once you're out of that period they couldn't care less how long your engine lasts because they're not paying the bill for replacement - you are.

[Brucelee]

I think the distinction that has not been made so far is wear vs. engine melt down.

I would never suggest that the Boxster IMS issue is related to dirty lubrication. We know that is a design issue.

Now, if someone wants to reduce nornal wear on an engines internals (for whatever reason) they should care about the quality of the oil, as that is a major factor involved in wear, along with the intrinsic engine design.

Again, used oil analysis does not lie. If even the best synthetics are shot north of 10K miles, these oils cannot be doing their job and extra wear will result.

The only issue is whether anyone cares. Porsche would not be concerned because this wear would not generate any issues during the warranty period.

However, the flip of the coin is, if you Porsche engine blows up under warranty, you can BET they will be checking your maint. history to see if you changed the oil according to their rec.