Quote:
Originally Posted by thekurgan
Roundabouts as in g forces possibly causing some starvation? (reaching far here on stock tires/suspension assumption)
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Stock suspension, but 275/35/18 S-04s on Apex wheels all around, so pretty sticky. The roundabouts here are single lane and not very big, no more sustained G's than any turn on any track or auto cross course I've ever been on (not in the M, but just in general). I'd say starvation would not be the issue, at least I'd hope not if they tested these cars on the ol Ring with the karussell!
Quote:
Originally Posted by gatorfast
Seems like most who are using 0w40 shorten the change interval to 4-5k miles.
But even at double that interval, that report above does not look normal.
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As for being too long on one change - I had to add 3.5 quarts (1 every 2500 or so, somewhat replenishing the protection package), and there was plenty of additive remaining according to TBN. In terms of viscosity, it was still at ~34 weight while the Castrol lost almost 15wt over the previous change spans.
The reason I went so long was that:
a) I wanted to see what it would look like and
b) wanted to change just before cold weather so I could keep it in all winter when it will be seeing sub-zero temps and 10W-60 is quite poor at those startup temps.
I'll be changing now at ~5k miles to check again, but will probably stick with 0W-40 for the winter since it will hardly ever be above 32F for 4 months. My plan was to get on a rotation of Castrol for summer and Mobil for winter, but we'll see what the coming miles bring.
As a final note, just for information, my CPO warranty expired just a few weeks ago in mid-August this year...