Aug 4 2009, 10:15 PM
QUOTE(termignoni @ Jul 31 2009, 07:58 AM)
RON95 is not suggested for turbo cars.. if his scooby was an NA impreza, then it's fine..
a lower RON rate indicates a higher burning rate and otherwise if it's higher.. meaning that, if a turbo car runs on lower RON, petrol will evaporate faster in the combustion chamber leaving it with detonation (combustion without fuel).. and that would lead to pinging, and even worse, engine seizure as the combustion chamber is dry..
No. RON levels do not indicate higher burning rate. Rather it indicates a higher ignition point. Higher RON fuel is harder to ignite but burns the same, hence the energy content of the fuel is the same. Having a RON level lower than the min for the engine means that the ECU in the engine will not be able to compensate the ignition timing to the point where pre-detonation does not happen. a lower RON rate indicates a higher burning rate and otherwise if it's higher.. meaning that, if a turbo car runs on lower RON, petrol will evaporate faster in the combustion chamber leaving it with detonation (combustion without fuel).. and that would lead to pinging, and even worse, engine seizure as the combustion chamber is dry..
For your information, all export models of Subaru Impreza runs on RON95 to cater for the lower RON levels in countries outside of Japan. Anything higher than RON95 is considered as premium fuels and not carried by every petrol station, making it difficult to refuel.
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