Quote:
Originally Posted by omgzirra_exe
My first track day at Auto Club Speedway (RIP), I was running Liqui Moly 10W-60 and the car just didn't feel happy. It ran hotter, felt lazy, and was noticeably down on power.
At lunch, I drained it and filled it with Motul 300V 5W-50. It was a winter event, so ambient temps were still favorable. As soon as I got back out on track the car felt much more responsive, especially in the upper RPM range. Ever since that day, I've stuck with 5W-50 or 15W-50, regardless of brand, just not Liqui Moly.
These days I mainly run Red Line. Oil consumption has been pretty reasonable, around 1 quart every 3K - 4K miles, and that includes a little bit of oil weeping.
My oil change interval is only about 2.5K to 3K miles anyway, so consumption has never really been a concern.
FWIW, I also run E85, so I'm changing the oil more frequently regardless because of fuel dilution. I also prefer oils with a higher ZDDP content for the added wear protection due to running E85. I am also on BE Bearings.
Currently debating a RB refresh with ACL mix/match sets from Mporium.
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Interesting stuff.
One point though, I wouldn't run 15w50 if I were you, that oil will be thicker when the engine's cold & will take longer to circulate.
Quote:
Originally Posted by ///M Power-Belgium
My S65 has the "COLD" start up clunk and rattle noises too (always had it) just like many S65 owners ..
As far as I know , DD drivers (daily driven cars) don't get the terrible clunk noise.
Sometimes it sounds bad , really bad . I mean like a "Kalashnikov" (no kidding)!
Back in time , a good friend of mine was in my garage and I started my car up (Cold)
He was frightened by the rattle and clunk noise and said : Man WTF was that ?!?!
In the beginning I was thinking , honestly this can't be healthy for my S65.
But so far so good...It didn't hurt my engine.
How to fix it ?
Just daily drive the car , and you won't get the S65 clunk and rattle noises anymore (!) My car is a garage queen , that's why I always got it .
If I drive my car 2-3 times/week , the clunk noise is completely gone ..
Just test it out , and you will see..
After all those years, I saw for once that the clunk noise is been fixed by replacing the S65 Vanos Gears .
It was a BMW PUMA case and it was posted on this forum , as you can see and read ...
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I remember that one now that you mentioned it, good to know they seem to keep going on fine despite the heavy clank/clunk! lol.
My M3's always been a garage queen, I couldn't really afford to daily it, hence having a 330d too. Also, I tend to not to drive at all from Monday to Thursday night
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It's weird how the clunk doesn't always happen though, I only drove it just the week before!