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Follow the owner's manual directions. Honestly.


Octane needed by any petrol engine is basically determined by compression ratio and combustion chamber design (Ricardo circa 1920). Google the subject to find a table of compression ratios/octane needed. Computerised engine management, by optimising ignition timing and air/fuel (mixture) ratio has made economic the use of lower octane fuel in engines that ...


Stopped here after looking around without too much success for a good explanation about overheating due to lean burning in an engine. Here my two cents about the subject: 1- It is well known and documented that peak or maximum combustion temperature is lower as the atmospheric air/fuel ratio deviates from stochiometric, so a lean combustion generates a ...

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