• The lower the octane of the fuel the more of said fuel the car will use.

    Citation needed. Generally speaking lower octane fuels have a higher calorific value, but are more inclined to detonation. Unless your car's ECU has knock detection, and backs off the ignition timing significantly with lower octane fuel, it won't affect consumption rates. However, it may well up limiting maximum boost in an engine with knock detection and turbos.

  • It’s the knock related timing issue I believe. Therefore, if you pootle about whilst never labouring the engine I imagine you might not run into a situation where the engine winds the timing back.

About

Avatar for Dammit @Dammit started