the 303 stuff works but doesn't last very long at all and any rain and it will streak and run. I don't get why people like it. I recently used some tire wet stuff, don't remember the brand atm. It last for weeks even through many washes. You just have to work more because it's thick and you need to get as much excess off as you can so it doesn't attract dirt.

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2008 E70 4.8i sport
space gray 20" staggered 214 wheels
Tech package
Cold Weather
Comfort Access
HUD