First off you need to be more specific. Are you refering to 20*C or 20*F?Luckily Vanadium is a metal and it is a solid at either F or C but you need to make sure to specify.
I Think you have other problems. Change the fuel filter and if that doesn't do it take it to a garage.You purchase a gasoline can and a funnel. Fill the gasoline can with fuel from your local...