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      07-14-2012, 06:47 AM   #7
Atebit
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Drives: Yellow 2011 Z4 sdrive30i
Join Date: Dec 2010
Location: NC

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Quote:
Originally Posted by raven333
Hi! You may want to consider having the fuel system and head decoke using one of the companies who do this system ($100), I have seen some real evidence on programmes as to its effectiveness, it does seem the longer you leave it then the harder it is to get all the crap out understandably. I would consider changing the Diff oil as it is easy and maybe the transmission fluid (no such thing as lifetime oil). I would also consider a spark plug change again they say 100k, but 50K is good, remember you want to get the benefits of this cost!!!
WRT (assuming we're taking automatic) transmission fluid, I always thought it was hydraulic fluid rather than oil. With the transmission being a closed system, IMHO there shouldn't be a need to replace it unless you've had some other transmission problem that's contaminated it or caused it to burn.
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