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      09-07-2012, 06:23 PM   #1
Sully1Time
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Having a hard time keeping my rear end clean?

Just washed my AWM3 went for a ten minute spin, got back and the entire bumper, trunk, and rear quarters were filthy! I Just have the small factory spoiler. Will a different spoiler change anything? Or do M3's do that no matter what. For the record this is a random pic of my M, not where I went on the 10 minute rip, err I mean trip

Pic for reference to the see my spoiler
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      09-07-2012, 07:08 PM   #2
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I have the same issue. Must be aerodynamic design in the rear (sts).
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      09-07-2012, 07:10 PM   #3
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i also have the same issue.
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      09-07-2012, 07:16 PM   #4
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Get a bidet!
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      09-07-2012, 07:26 PM   #5
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Quote:
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Get a bidet!
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      09-07-2012, 07:39 PM   #6
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same same
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      09-07-2012, 07:50 PM   #7
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baby wipes
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      09-07-2012, 07:51 PM   #8
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I recommend this stuff called monkey butt powder. It helps. Wait we are talking about our rear ends right???
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      09-07-2012, 07:54 PM   #9
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Any vehicle with decent aerodynamics will do this. As you drive, especially at speed, a vacuum is created behind your vehicle and dust will get sucked in.
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      09-07-2012, 08:05 PM   #10
Sully1Time
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definitely talking about the car, just a little levity in the thread title.

Figured the aerodynamics was the culprit, so I'm better off with a small spoiler then a larger one? The least amount of crap on the back of the car would be my choice
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      09-07-2012, 08:14 PM   #11
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i used to love when my AW e46's ass was dirty. Thought it looked badass. lol
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      09-07-2012, 08:30 PM   #12
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Quote:
Originally Posted by Sully1Time View Post
definitely talking about the car, just a little levity in the thread title.

Figured the aerodynamics was the culprit, so I'm better off with a small spoiler then a larger one? The least amount of crap on the back of the car would be my choice
Sorry Sully - I could not resist.

Without question aerodynamics are the cause. Anytime I take a trip at higher speed in my AW the rear end looks nasty.

In a wind tunnel I am sure the dirt laden wet material that goes over the roof and sides - deposit on the rear, because of the diffusers, and as LarThal indicates the vacuum created.
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      09-07-2012, 08:40 PM   #13
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Quote:
Originally Posted by TTSam View Post
Sorry Sully - I could not resist.

Without question aerodynamics are the cause. Anytime I take a trip at higher speed in my AW the rear end looks nasty.

In a wind tunnel I am sure the dirt laden wet material that goes over the roof and sides - deposit on the rear, because of the diffusers, and as LarThal indicates the vacuum created.
No worries, I made the title to be funny and expected some good comments
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      09-07-2012, 09:45 PM   #14
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Ditto. Let me introduce you to these mammy jammies:
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      09-07-2012, 11:57 PM   #15
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Lol ^.

I thought white was easy to maintain because it generally doesn't show dirt. Well I was wrong. Space Grey doesn't show dirt because it's like teh same color as dirt. I washed my Space Grey 335 like only 10 times in 3 years. I've had my Mineral White M3 for one week and it already needs a wash. And year my rear end is durty
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      09-08-2012, 12:00 AM   #16
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it gets worse when you have an exhaust. the shit that flies out the exhaust usually removes the wax from my rear.
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      09-08-2012, 12:19 AM   #17
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Get used to it, it sort of gives the car character. Just make sure to wash the car weekly if daily driven or every two weeks if used intermittently.
Here is a pic of the M after a week of daily driving (not usual) on somewhat dirty roads because of the rain
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      09-08-2012, 12:49 PM   #18
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Quote:
Originally Posted by 1sikbmr View Post
it gets worse when you have an exhaust. the shit that flies out the exhaust usually removes the wax from my rear.
I have a Megan exhaust and figured it was not helping the problem as well as aerodynamics.

Quote:
Originally Posted by motortrend View Post
Get used to it, it sort of gives the car character. Just make sure to wash the car weekly if daily driven or every two weeks if used intermittently.
Here is a pic of the M after a week of daily driving (not usual) on somewhat dirty roads because of the rain
Needs a bath for sure!
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      09-09-2012, 01:23 PM   #19
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Same issue...keep microfiber rags and finishing spray handy.
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      09-09-2012, 07:10 PM   #20
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I use a California duster but only for fine dust like sitting for a week in my garage.
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      09-09-2012, 07:19 PM   #21
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my z06 used to get the same way !
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      09-09-2012, 07:44 PM   #22
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i also have the same issue.
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