Try each grade and see which works the best for performance/fuel economy...
it might be cheaper to use something like 89 Octane (mid grade) it was this
way with our 91 Golf..... Going to 91 Octane didn't help economy or power,
but it got better performance then with 87.
"Tavish Muldoon" > wrote in message
om...
> Hello!
>
> I have a used 92 Passat CL with no drivers manual anymore. The fuel
> opening area say 87 Octane is fine, but premium fuel is preferred.
>
> I assume there must be some knock sensor to detect grades of fuel?
>
> Is there any benefit to using premiun (91,92,93 or 94) octane vs. 87
> in this model of car?
>
> Better MPG? The difference in cost between a litre of 87 and 91-94 is
> $0.20/ litre - so it is significant (1 US Gallon ~= 3.8 litres). I am
> trying to see if is worthwhile
>
> Right now in the city, a 70 litre tank of 87 gas gets me around 600km
> in the city, around 800+ km on the hightway. (1 mile ~= 1.6 km)
>
> Thanks,
>
> Tmuld.