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[DaFlake]

Quote: Originally Posted by Minipnut (original)

my mini hand book states the minimum requirement for my car is 91 and recommended is 98-100, my friends 56 says exactly the same ?

91 what?

I looked in the manual and that is the AKI rating which is typically the octane rating (US Based).

octane rating: Information from Answers.com

Above is a good description of how fuels are rated and how they are different from country to country. Your 91 AKI is what we in the USA call Premium fuel (top octane rating at most pumps). The tests are based on RON (a different formula), not AKI... You put 91 RON in a R56 and see how that baby runs.