Fuel ratings explained: How premium unleaded is different

AutoExec Summary: RON, or Research Octane Number, measures petrol’s octane rating, indicating its resistance to premature detonation, which can cause engine knock. In Australia, octane ratings range from 91 to 98, with 98 RON being premium unleaded. Higher RON fuels are suitable for high-compression engines, enhancing power and fuel efficiency. While premium fuels may offer cleaning benefits, adherence to manufacturer service intervals is more crucial for engine maintenance.

Brands mentioned: Shell, Ampol