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MHD MHD is offline
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Join Date: Jul 2013
Car: 07 335i AT
Default 10-04-2017, 06:09 AM

Between acn91 and 95oct, the difference is quite big. But for your specific case, stg 1 93oct (98ron) is 360hp crank, 1+ 380. We're conservative on the FMIC recommendation due to customers road tracking or sustaining top speed in Germany; for most application 1+ is fine on stock FMIC.
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