Quote:
Originally Posted by PAX5
While it's true that the AFFECTED components are the same in the N63 vs the S63, the CAUSE of the failures in the N63 appears to be related to the engine oil. So far my inexact research and discussions point to:
1. oil viscosity breakdown, caused by excessive heat generated by the twin-turbo design location in the V8 valley, and
2. low(er) oil pressures due to excessive oil consumption (not clear what causes the excessive oil consumption in the N63).
The S63 twin-turbo design ( http://www.***********.com/showthrea...920#post141920) has two major design differences that may very well prevent pre-mature oil degradation and excessive turbo heat: The S63 has a different cooling system using a belt-driven mechanical pump. An additional oil cooler is used that is mounted below the radiator as well as a larger engine oil cooler. The water to air intercoolers on the S63 are also larger than those on the N63.
This campaign will now reset the new oil change interval for the N63 engine to 10K miles.
Does anyone know what the official oil change interval is for the S63, or maybe it doesn't matter, because the S63 engine simple runs cooler ... |
I believe the oil change interval is 15,000. I seem to remember that showing up when i picked mine up at the PDC.
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2013 E70 X5M
2011 E92 M3 traded in, 2009 CTSV LEMON, 2008 Z06 Lemon Law, 2007 Z06 Dealer butcher, 2004 Z06 (Sold)
1996 GrandSport (sold), 1996 Impala SS (Sold)