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Re: octane

It probably means 91 octane using the ROZ/RON method. That's equivalent to
87 octane on US pumps... different calculation method. All of my VW's have
said 91 octane, which means 87 on US pumps.
    HTH!
    -Josiah

Zsolt Kovacs wrote:

> There is a label on my 5k tq that says it requires min 91 octane gas.
> Previously in my other non-turbo Audis (5kS) I never bothered to put
> anything else but regular gasoline and performance or gas consumption
> wise it didn't make any difference. In my quattro I do use premium and
> I'm wondering if it does have significant advantages over lower octane
> gas. How is the octane controlled in non-leaded gasoline?
>
> I just thought some of you may have a scientific explanation or you just
> learned it from experience.
>
> Thanx,
>   Zsolt