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2Addicts | BMW 2-Series forum Technical Topics B58 (M240i) Engine, Transmission, Exhaust, Tuning B58 91-93 oct change? BM3

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      07-17-2020, 07:41 PM   #1
R3DR0CK3T
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B58 91-93 oct change? BM3

hello please excuse my rookie question towards fuels but i will be traveling to the midwest soon. I currently have the "stage 2 91 acn agg" map flashed to my m240i . my worry is will my car be able to take 93? i have to drive through states that dont have 91 and only have 93? will this cause any issues ?
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      07-18-2020, 04:31 PM   #2
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Zero issues. Going the other way would be cause for concern.
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      07-18-2020, 06:53 PM   #3
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Higher octane won't hurt and you won't notice any difference. The 93 just resists pre-igmition a bit better. As pointed out, you would have to be careful if it were the other way around.
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      07-18-2020, 07:30 PM   #4
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thanks everyone
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