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I have used in the past Lucas complete fuel system cleaner as well as Mobil's Techtron in an Active Autowerks supercharged and very modded E46 M3 and in a stock E92 M3 I had in the past,and heard also the engine ping in both engine. They do lower octane,dont know the reason behind this,but that was my experience when the products was used.
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2009 N54 335i Sport
Last edited by Maranello455; 02-11-2013 at 08:30 PM..
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