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United Kingdom

Posts: 4

There are 2 tests for the AKI (anti-knock index) of fuel, RON and MON.


Here in the UK we use the RON rating but in america they add the results of the RON and MON tests then divide it by 2.


I’m in the middle of testing the effect of the different super unleaded fuels on a tuned MK3 and I can safely say already it makes a massive difference which fuel you choose to run on the power these cars develop.