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      04-10-2019, 10:23 AM   #5
ziekxq
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Drives: 2011 535i xDrive
Join Date: Feb 2016
Location: United States

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Quote:
Originally Posted by pf10 View Post
Do you run E85? My spark plugs go bad within in a few months. I'm being told it because of the E85 and my custom tune. My mechanic is saying my ignition coils will need to me changed more often also because of that.
I am not running E85, I know I would have to change spark plugs every 20k mile vs every 50k mile but I never heard anything about coils.

My old coils were still good but I got them changed any way just because of the miles on them. Plus, on FCP website they are dirt cheap.

Also, I am only getting misfires because of running higher boost. So, I wanted to see what plugs would be best choice or if I could still use OEM plugs with .018-.020 gap.
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