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Heiko, I agree with the octane, but find that I end up richening the carbs ever so slightly to compensate for colder, damper, DENSER air. Maybe it's just an ideosyncracy with my car, but it's been the pattern for the last three years- it needs a little more fuel in late fall, and starts running a bit rich in mid spring Absolutely anecdotal Toby B > Dave, > forget the octane stuff. VW said that a Type III engine needs 90 and nothing less!!! > I cannot understand what the panic is about driving in the winter. > I usually switch on the heating and thats it. > No different fuel, no different spark plugs, no different oil, no nothing. This car is not from before the war, it is designed to run in the winter. > By the way the filling station will do the fuel change. There is a difference between marketplace fuel in the summer and in the winter. The winter fuel does evaporate easier or put it the other way round the summer fuel does not. This is basically to prevent that too much fuel disappears into atmosphere in the summer. > This has nothing to do with the octane number. > Keep driving. > Heiko (Fuel system engineer at a german car manufacturer) > 68 Notch, 70 Fast, 71 Fast