Description All Fleet Motor Oil is a premium heavy duty motor oil for use in mixed fleets in both on-highway and off-highway service. Harvest King All Fleet Motor Oil provides superior protection to modern high-speed, low-emission, four-stroke, heavy duty diesel engines, as well as passenger car gasoline and diesel engines. It possesses excellent soot-handling capability and long-term wear protection and meets or exceeds the requirements of the latest applicable API Classifications. Protects emission control systems Outstanding oxidation stability Excellent low temperature properties helps speed cold starts 5 GAL (18.9 L)