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I got 31mpg on the last tank of gas in my N54 powered 135i on a trip from Columbus, OH to Huntington, WV. Mountainous area, so definitely not a flat cruise. We stopped once at McDonalds, and drove hammer down to 70mph average all the way. This is with the JB4 set to the 2-18-11 FW on Map 2. That is green enough for me. That was with 93 octane BP fuel from Ohio, and no E-10.
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(FBO) Cobb Stage 2+, AR Downpipes, Injen DCI, AA (Sport) FMIC, ER Chargepipe/Synapse BOV, Carbon fiber bits and Breyton GTS-R Wheels.
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