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ibimmer954 · 09-26-2013, 04:02 PM

89 RON? I would never run gasoline in the 328i engine with such a low octane rating. You're talking a turbo engine with relatively high compression. The only way 89 RON would work is if you kept the revs super-low. At that point, you might as well have a diesel. The U.S. owners manual says minimum 89 AKI which is like 93-94 RON. 89 RON is about 84-85 AKI which we can't even get in the U.S. Well, not in California anyway.

09-26-2013, 04:02 PM	#3
ibimmer954 Major 138 Rep 1,424 Posts Drives: '23 i4 M50, '15 M3, '18 911 Join Date: Jul 2007 Location: San Diego, California, USA iTrader: (0) Garage List 2015 BMW M3 [9.75] 2023 BMW i4 M50 [0.00] 2018 Porsche 911 C4S [0.00] 2019 BMW X4 M40i [0.00]	89 RON? I would never run gasoline in the 328i engine with such a low octane rating. You're talking a turbo engine with relatively high compression. The only way 89 RON would work is if you kept the revs super-low. At that point, you might as well have a diesel. The U.S. owners manual says minimum 89 AKI which is like 93-94 RON. 89 RON is about 84-85 AKI which we can't even get in the U.S. Well, not in California anyway. Last edited by ibimmer954; 09-26-2013 at 04:10 PM..
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