Quote:
Originally Posted by gmookher
Drive it. Break it. They WILL fix it, its bad PR if they dont.
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I understand your point there, but you could be doing longterm damage that may not show up for a few years (like after a warranty period).
Audi should have recalled the 2004-2006 S4 due to bad cam adjusters on the intake VVT. They quietly ignored the issue, and most S4s of those years need major engine repairs by 75K, and many are simply ruined and need to be replaced...conveniently after the warranty has expired. My 2004 S4 was an absolute nightmare the last 1-2 years of ownership. As soon as it hit 65K, it was all downhill....primarily out of bad intake VVT components causing a chain of issues.
The long list of problems is from bad cats (from shooting raw fuel into them due to misfires), scored cylinder walls (due to other contributing issues, but misfires add by allowing unburnt fuel to cause oil dilution), a myriad of timing chain/adjuster/tensioner problems, grenaded motors, power loss, and 5 figure repair bills. The BHF 4.2L V8 in that car lists from Audi at $13K; if you have to replace it.
If it were me, I would drive it *sparingly* with a running misfire problem until it gets fixed; assuming you plan on keeping it beyond 50-60K. High compression motors and misfires create a toxic mix for the oil. The effects of which may not show up for a few years, but in an all aluminum motor....they will most likely show up if there has been any lubrication impacts..... If you must drive it daily, I would routinely check the oil to see if it smells strongly of raw fuel. If so, change it or get it changed.
My $0.02