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BMW 3-Series (E90 E92) Forum
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Convenient Way to Keep Wagon Rear Window Clean?
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02-07-2016, 09:58 PM | #1 |
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Convenient Way to Keep Wagon Rear Window Clean?
Any suggestions for keeping the rear of the car cleaner, longer?
The rear window and tailgate on my E91 get dirty and dusty at the drop of a hat. My car color is dark Deep Sea Blue Metallic, and dirt is very visible over the dark color. The other surfaces on the car are almost spotless - the roof, hood and side panels shine. This indicates that the car is aerodynamic (Cd = 0.30) other than the low-pressure, turbulent flow "bubble" trailing the car. Mine gets dirty almost immediately after a wash. The old Detroit wagons used to use a wind deflector that looks similar to a spoiler but channels airflow from over the roof and redirects it down over the rear window. They generally worked well but are no longer used due to increased drag. This picture is extreme, after returning from the mountains in the winter, but illustrates the extent of the problem - clean top and sides, filthy back. Thanks.
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2011 6MT RWD ClubSport Wagon | 3,185lbs | 1 of 149 ZSPs delivered in North America
Outside: BMW M-Aero, Euro region lighting, Seibon | Inside: M3 cockpit, Recaro SPG, Prototipo, AutoSolutions SSK, UCP | Stop: M3 ST-40R, PFC | Grip: Solid-mounted subframes, rear coilover conversion, M3 Nitron R3, Hyperco, SPL, AKG, ARC8 | Go: StageFP, CF snorkel, 3IM, MILVs, SuperSprint headers, Dundon Motorsports Inconel exhaust, VoltPhreaks | Cool: CSF | PCA #2018100384 | BMW CCA #505794 |
02-10-2016, 12:51 AM | #2 |
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Drives: E91 RWD 6MT, X3, Ducati S4R
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Garage List 2011 E91 6MT RWD &q ... [0.00]
2005 Ducati S4R 996 [0.00] 2000 Ducati M750 [0.00] RIP - 2011 E91 328i ... [10.00] |
Updating for the benefit of future searchers.
I applied RainX in two coats on the rear window. The weather is uncharacteristically dry this week so not the most challenging of conditions. Dust and dirt still collect in the rear. But the layer is very light and almost falls off the glass with a light swiffer brush. Will update after a trip to the mountains if anything significant changes
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2011 6MT RWD ClubSport Wagon | 3,185lbs | 1 of 149 ZSPs delivered in North America
Outside: BMW M-Aero, Euro region lighting, Seibon | Inside: M3 cockpit, Recaro SPG, Prototipo, AutoSolutions SSK, UCP | Stop: M3 ST-40R, PFC | Grip: Solid-mounted subframes, rear coilover conversion, M3 Nitron R3, Hyperco, SPL, AKG, ARC8 | Go: StageFP, CF snorkel, 3IM, MILVs, SuperSprint headers, Dundon Motorsports Inconel exhaust, VoltPhreaks | Cool: CSF | PCA #2018100384 | BMW CCA #505794 |
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02-10-2016, 10:12 AM | #3 | |
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02-14-2016, 07:55 PM | #4 | |
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1246
Rep 1,239
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Drives: E91 RWD 6MT, X3, Ducati S4R
Join Date: Dec 2014
Location: PNW
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Garage List 2011 E91 6MT RWD &q ... [0.00]
2005 Ducati S4R 996 [0.00] 2000 Ducati M750 [0.00] RIP - 2011 E91 328i ... [10.00] |
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I wonder if these would help? Notice the vertical fairings on either side of the new X5 rear windor. Mercedes and Toyota are using these more frequently now on their new models.
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2011 6MT RWD ClubSport Wagon | 3,185lbs | 1 of 149 ZSPs delivered in North America
Outside: BMW M-Aero, Euro region lighting, Seibon | Inside: M3 cockpit, Recaro SPG, Prototipo, AutoSolutions SSK, UCP | Stop: M3 ST-40R, PFC | Grip: Solid-mounted subframes, rear coilover conversion, M3 Nitron R3, Hyperco, SPL, AKG, ARC8 | Go: StageFP, CF snorkel, 3IM, MILVs, SuperSprint headers, Dundon Motorsports Inconel exhaust, VoltPhreaks | Cool: CSF | PCA #2018100384 | BMW CCA #505794 |
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