I am using Premium, 93 Octane. I buy Shell whenever I can but we lost the last Shell station in my town about a year ago. BP is my second choice but also buy from Sam's on occasion. Their fuel is not rated Top Tier but we have used it for many years with no issues. It is usually about 10-15 cents a gallon cheaper than the name brand Premium. We don't have 91 octane in our area.
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COL(Ret), US Army Hagerstown MD
2019 X5 40i MSport Alpine White/Coffee (my 13th BMW)
2015 Mercedes SL400; 2009 Lexus RX350
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