I use at least 91 in the 330 (and usually 93 since that is what comes out of most pumps in this area). I have used 89 for a few tanks when I couldn't get 91, and the car ran OK but the mpg went down. The same thing has happened on the motorcycle (BMW motos want 91 octane also)
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Originally Posted by broknlgs24
ZX - where are u from? i've never heard of such a trivial task b4. that's crazy.
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Many of the self-serve stations up here do that too - you have to re-run your card after $50. My guess is that is what they pre-authorize when you first run the card.