On 21/08/2015 15:31, Dave Plowman (News) wrote:
In article ,
Fredxxx wrote:
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.

Generally speaking, a knock sensor only retards the ignition from the
mapped setting. And the vast majority of UK cars are mapped to run on 95
octane.

Some high performance models are mapped for 98 octane - but not many.

IIRC mine is mapped for 99...


--
Cheers,

John.

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