Re: Ran on 94 octane (from 87) now surge of momentary power at start then stutter

My Jetta ('90 Carat) tends to rumble ***a little*** when I floor it....me thinks that that is due to it being an automatic transmission...regardless, there is a noticeable difference on Premium fuel. I typically use Petro Canada fuel, as Esso fuel tends to have a very high water content, and the car runs poorly on Esso anyway...

- Peter

attempts....

I don't know if this is relevant, I have a V5 Golf. I have to use Shell Optimax (98 octane). I was advised to use this since I had a lot of knocking noise coming from the engine. This seems to cure things and does give slightly better consumption. I have been told by a friend that races here that the petrol in UK is really bad quality and so the higher octane fuel seems to be better for a larger engine.

Regards,

Babu.

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