Hello all, I have a problem here in frozen Holland at the moment. As some of you know I use bioderv when possible and I have mabe 3/4 of a tank in the jeep. Came to start it today and the bio has gelled. I know we used to put a little petrol in truck fuel tanks years ago in the winter to stop the fuel freezing,but I dont know if it works with Bio the same. Does anyone know for sure what,if anything I can do to get this sorted. Regards, Dave.