Quote:
Originally Posted by paulv
I used Motul 5W-40 Xcess for 3 oil changes after the factory fill, but still had noticeable valve train noise on startup. I never used M1 0W-40 as I use that oil in the wife's MB E320 and there's always startup noise. I went with M1 5W-40 for two oil changes but had valve train noise again. I just recently went with Redline 5W-40 and the valve train noise is virtually gone. BTW, the UOAs on the Motul and M1 5W-40 oils were good, it was just the noise that bothered me.
I called Redline and they told me that their product is higher in ester than other PCMOs. Since ester is a polar molecule, it will stick to metal parts.
Regards,
paul...
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OK Paul I just ordered some Redline 5W-40 I will report my experience after my next oil change.