Quote:
Originally Posted by M3ZCP6MT
How big of a difference when you have 91/93 vs 98?
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98 RON=93 octane, RON is a EU standard.
RON Reaserch Octane Number. (Used in Europe and elswhere in gas stations)
MON Motor Octane Number.
AKI Anti-Knock Index. This is the number that is posted on the gas station in the USA as "Octane". It is derived as (RON + MON)/2