N55 - e85+93 OR race gas OR race gas+93 - BMW 3-Series (E90 E92) Forum

AJG1137 · 08-05-2012, 12:16 PM

Hi all. Looking to change my fuel to get a higher octane and slightly better performance, and am ignorant to the best way to achieve this. I have an N55 335xi with JB4 (no flex fuel wires and no other mods). Would it be best for me to run a 20% e85 mix with 93 octane fuel, mix race gas with 93 octane, or just put 100% race gas in? I would plan to drive this way most of the time, so it wouldn't just be for "track use".
Thanks.

eyim1988 · 08-05-2012, 12:23 PM

Mix e85 with 93 for
The most cost effective , pure race gas for track use

benzy89 · 08-05-2012, 01:35 PM

Mix 93 octane with some E85. You'll get similar results to mixing/running Race Gas at a fraction of the cost.

08-05-2012, 12:16 PM	#1
AJG1137 Member Drives: 2011 335i xDrive Join Date: Jun 2011 Location: Bloomfield Hills, MI Posts: 67 iTrader: (1) Garage List 2011 335i xDrive [0.00]	N55 - e85+93 OR race gas OR race gas+93 Hi all. Looking to change my fuel to get a higher octane and slightly better performance, and am ignorant to the best way to achieve this. I have an N55 335xi with JB4 (no flex fuel wires and no other mods). Would it be best for me to run a 20% e85 mix with 93 octane fuel, mix race gas with 93 octane, or just put 100% race gas in? I would plan to drive this way most of the time, so it wouldn't just be for "track use". Thanks.
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08-05-2012, 12:23 PM	#2
eyim1988 Major Drives: 2011 335i coupe Join Date: Feb 2011 Location: Los Angeles, CA Posts: 1,246 iTrader: (2)	Mix e85 with 93 for The most cost effective , pure race gas for track use __________________ Procede v5, ER Competition FMIC, ER Chargepipe, HP Autowerks foam filter, Custom turboback exhaust, 369 whp/444 torque (no intercooler)

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08-05-2012, 01:35 PM	#3
benzy89 Banned Drives: '08 E90 335i Join Date: Jan 2012 Location: Northern NJ Posts: 2,402 iTrader: (3) Garage List 2008 BMW 335i [3.75]	Mix 93 octane with some E85. You'll get similar results to mixing/running Race Gas at a fraction of the cost.