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Old 09-30-2007, 05:03 PM   #15
Power Junkie
GM give me my fix please!
Drives: 95 Toyota GT4
Join Date: Sep 2007
Location: England.. aka the EU's whipping boy!!! (but not for much longer, hopefully)
Posts: 173
Ron stands for Research Octane Number.... in the US i believe you use a multitude of different units... (PON, AKI, RdON) basically it's just down to the way it's tested to achieve the octane rating. Typically ron (apparently) tends to be 4-5 units higher than the US / Canada equivalent tests.
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