Changing fuel at the gas station: Why is there different fuel in winter and summer. Winter gasoline contains more volatile substances than summer gasoline.
The wrong fuel in the tank can be problematic, as the European automotive industry association ACEA explains. The EU states prescribe certain periods of time for switching from winter to summer fuel: From mid-March, petrol stations can convert toSummer fuel, and from May 1st this must be available at all petrol pumps. Winter fuel will be sold again at the beginning of October.