I don't know about over there but in Aus, there are cleaning additives added to the higher octane fuel, similar to the techron stuff but in lower doses and i do believe it "cleans" the engine.
We have a car that doesn't detect or need higher octane fuels but when we go for a long drive (4-6 hr drive) in it, we do put the higher octane fuel in to give the system a bit of a clean.
Last edited by gumpy; 03-10-2010 at 04:11 PM.
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