Fuel strainer consists of an inner sleeve and an outer sleeve. The outer sleeve acts to prohibit water from passing there through while allowing fuel to pass, and the inner sleeve acts to permit fuel to pass there through but prohibit diesel fuel oil wax crystals from doing so when the fuel oil being strained is below the cloud point at which the wax crystals tend to be formed. This strainer also provides for sufficient fuel to continue to be supplied to the fuel using means even is wax crystals clog the inner strainer sleeve.