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      11-20-2013, 06:27 PM   #21
tranquility
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Drives: 2011 Z4 sDrive 35i
Join Date: Aug 2007
Location: Montréal

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Quote:
Originally Posted by raven333 View Post
For those out of warranty I would seriously consider an injector and fuel system clean first, and not the cheap additives off the shelf, before I would run to the cost of replacing the very very expensive injectors..........in fact I would recommend doing this every 20-25k as a matter of maintenance!!!!!
What would you suggest? Off-the-shelf addictives won't help at all?


Quote:
Originally Posted by nicknaz View Post
Hey guys, back in the day I saw threads that discussed fuel quality as a factor in injector and HPFP failure.

Some posters got fuel where too much ethanol had been mixed, others were using fuel from random "non top tier" sources.

What kind of fuel are posters who are experiencing problems using?
I've only had rough start idle once and use 91 octane only.
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