M978A4 Fuel Servicing Truck (Tanker) - Oshkosh Defense
Performance For The Most Demanding Refueling Missions. Oshkosh Defense® HEMTT M978A4 Fuel Servicing Truck (Tanker). The Oshkosh® HEMTT A4 fuel servicing truck, or tanker, is specifically designed to transport 2,500 gallons (9464 L) of gas, diesel or jet fuel to Forward-Arming and Refueling Points (FARP).