Quote:
Originally Posted by vafan13
I'm guessing the dealer I bought my M5 from used Mobil 1 0w30 or 5w30, and in the ~7k miles before I switched, I had to add a liter every ~1750 miles. I replaced with Edge 0w40 and I've supposedly burned nada at about the point I'd normally get bugged to add a liter. Have others had this experience? I was hopeful of an improvement with the heavier weight, but burning nothing is beyond what I expected.
(and hopefully the oil level sensor didn't just coincidentally go bad)
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The oil weight makes a difference for sure.
Surprisingly, in my experience, the brand and additives seem to matter also. I was previously using MOTUL X-Cess 5w-40 and burned about 1 L every 700-800 miles. Yes, that's a bit on the high side, but my car probably wasn't broken-in perfectly by the past owner.
MOTUL is no slouch nor is it cheap.
I switched to Liquid Moly Molygen 5w-40 and currently have about 1,500 miles on the dash and burned about half a liter so far. It's the same exact weight as the MOTUL, but I seem to get about 25% of the oil burn rate. Not sure why, but it wasn't something I expected.