|
Higher octane fuel is really only designed to prevent premature combustion (also known as 'knock'). In this way, a higher strung FI engine can be tuned to take advantage of the built in knock prevention and run a more aggressive setup.
There are certain detergents used in some fuels so that they burn cleaner, but it's better to choose your fuel by brand than it is by octane rating (supermarket fuels tend to be filled with additives etc, so I'd rather use a 95RON shell fuel than a 98RON Asda fuel for example. IIRC, US octane ratings are around 5pts lower as you guys use an average of RON and MON, so a UK 95RON would roughly equal a US 91octane fuel.)
In basic terms, you should be fine with a 91 octane fuel. You won't notice any performance increase (other than a placebo effect) as your ECU isn't tuned to take advantage of the higher octane fuel. Hope that helps!
|