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The addition of oxygen-containing components into gasoline exerts a sustained influence on the cold start and warm-up performance of vehicles. The influences are shown on the basis of test results with motor vehicles. The cold start performance of vehicles with an alternative fuel such as methanol is very strongly dependent on the composition of a properly tailored fuel. This fuel should contain light boiling components for the best performance. Results from methanol fuelled vehicles under cold climate conditions are shown here. The warm-up conditions of an 1.3 l-engine starting at -10°C were researched. The additional fuel required under these conditions for heating all the components of the egine including the coolant and lubricant was calculated after the basic measurement of their temperature rise. The additional fuel required due to the higher friction was investigated by motoring the engine.