On 21/08/2015 15:22, The Natural Philosopher wrote:
On 21/08/15 14:50, Fredxxx wrote:
On 21/08/2015 14:00, The Natural Philosopher wrote:
On 21/08/15 13:09, dennis@home wrote:
On 21/08/2015 10:50, The Natural Philosopher wrote:

However a car adjusted to run on low grade fuel either by fixed design
or automatically will still run better on better fuel.



Why?

slower fuel burn usually.
less knocky more power.

That is assuming the engine is set up to use that power, or had a knock
sensor to advance the engine for higher octane fuels.

No. it doesn't mean that
Go and read up on IC engine theory

I would suggest you read up on the differences between high and low
octane fuels.

IC theory is all very good but quite clearly you don't understand
pre-ignition and the consequences of slow burn-high octane fuels.

Next you'll be saying high octane fuels contain more energy.