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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 09-26-2015, 01:32 AM   #1
chris_e46fanatic
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Join Date: Sep 2015
Location: US
Posts: 10
My Ride: 2004 BMW 330XI
Please clear this up for me

I just bought my first car and it's a 2004 330xi do u use 87? For gas because that's what I've been using whenever I bought gas so is the same or different?

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Old 09-26-2015, 01:38 AM   #2
dwtaylorpdx
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Join Date: Jul 2011
Location: PDX
Posts: 539
My Ride: 2005 330xi
The engine runs better (IMHO) on 92 especially at freeway speed.

Check the manual its got all the right info. I find in cold weather < 45F
87 octane runs a little better. Especially if your beating around in traffic.

MOST (Not all) 92 has less ethanol than 87 if you care about that part...

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Old 09-26-2015, 01:44 AM   #3
chris_e46fanatic
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My Ride: 2004 BMW 330XI
I have one other big question okay the engine has 132k miles on it and whenever I accelerate it vibrates I'm not sure if its coming from the front or the center support bearing. My friend told me it was the CV boots they need to get greased but I'm not sure and. Thanks man I just got this car I love it's been my dream but I'm not sure if this is a really big problem

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Old 10-02-2015, 10:27 AM   #4
erehtuo
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Join Date: Sep 2014
Location: Morgantown WV
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My Ride: 2004 330XI
Front axle issues can cause that for sure, dry CV joints are possible but could also be a number of other things

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