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All I know is that I learned my lesson when I accidentally put 87 into the tank of my 740iL. Granted, the engine isn't stock by any means, but the power difference was drastic...less power, felt like a brake was hanging, and lots of bucks and stumbles when I got on the pedal. I'm very ritual about using the Top Tier gases. Needed or not, i'll put cheap gas (Maverick, Shitgo, etc) in my Chevy, but the BMW's and motorcycle get nothing but the best. All these varying opinions about what octane is the best, but I'm in no position to question what a BMW engineer recommended is a safe min requirement for a $50k SAV. Maybe its a waste to some, but I'm not gonna risk it to save $5 every two weeks.
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650hp 10 X5///M - Stage 2, Vibrant 1794's , gutted cats, custom intake, AC Forged 22's 325hp 98 BMW 740iL - ///M5 6spd, www.bavengine.com w/ Performance Option, electric fan, CF intake tube w/ heatshield, Mag 14816 w/ notched bumper, Bilstein/H&R Stage II/Powerflex 600+hp 02 Harley F150 - MHP900 Stage 3 engine, KB2.3, 8# lower, 60# inj, Walbro FP's
135hp 01 TL1000R - M4 full exhaust, K&N, Yosh box, -1/+2 gears, 2CT's
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