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      03-29-2012, 08:53 AM   #6
kOncept's Avatar
Drives: E92 335i
Join Date: Feb 2011
Location: BNE

Posts: 99
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I only use 98 RON "Ultimate" in mine...

$6.00-9.50 difference per fill up or $312-494 per year (assuming you fill up once a week), it's not a big difference considering you're driving around in a $70-80k car?

There are claims that you get improved economy and performance using 98 RON so that already makes up for some of the difference in cost.
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