The ATI 30 Gallon Auxiliary Diesel Fuel Tank is a compact extended-range solution designed to increase diesel fuel capacity while preserving valuable truck bed space. This auxiliary tank connects to the factory fuel system using a Gravity Feed Installation Kit (sold separately), allowing diesel fuel to transfer naturally into the primary tank without the use of a pump. Constructed from premium aluminum, the tank is DOT approved for highway and commercial use , meeting and exceeding Title 49 CFR 393.65 requirements. Designed specifically for auxiliary diesel fuel applications , ATI delivers durable, American-made performance trusted by work trucks, fleet vehicles, and long-distance operators.