Quote:
Originally Posted by LeonardS
There are no stations in North Dakota that sell 93, so 91 is the best I can get. I’m going to buy 55 gallon drums of unleaded 100+ octane and mix it.
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But what is your altitude? 91 octane is more or less equivalent to 93 octane if you are always significantly above sea level and achieving a lower compression ratio.
Which may be why there's no 93 octane where you live.