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JamesM3M5 · 12-05-2012, 12:57 PM

I was told that leaded fuel clogs cats very quickly. O2 sensors will get slower over time, but the cats are what you need to worry about with leaded fuel.

12-05-2012, 12:57 PM	#10
JamesM3M5 Some dude 91 Rep 1,780 Posts Drives: E92 335i Join Date: Sep 2011 Location: Northern VA iTrader: (0)	I was told that leaded fuel clogs cats very quickly. O2 sensors will get slower over time, but the cats are what you need to worry about with leaded fuel. __________________ RRT E92 335i/6MT with stuff and things
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