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My primary goal is the best engine protection, cost and fuel economy are not important.

Heres one of the missing reports, not sure why they keep saying its an M3.... Same car and same oil.

OEM tune and mostly a DD with spirited driving on the freeways. Many frequent short trips, im less than 2 miles from work.

That was the only sample that displayed extra fuel dilution. I attribute it to it being a very cold winter and very short trips. I was less than 2 miles from work, so I figure that is why it was higher.

Yes, all changes since the factory fill have been Redline

Basic run of used oil analysis, missing one there 18 and 26 k but it was also changed at 22k and again at 26. Results were all very similar. My main curiousity on the oil argument when it comes down to Redline and Motul 8100, is that mainly a cost based argument for street use?

Im in the same boat here. Ive been using the Redline 5w40 and changing every 3500 miles. I drive spiritedly often but no track time, so when recommendation when it comes to redline track motul street, is that coming down to cost for not recommending redline for a dd?