Heavy Duty Engine Oils

Fleet SAE 40W

Fleet SAE 40W

Benefits of MAG 1 Fleet SAE 40 include:

  • High detergency and superior dispersancy keep engines clean and soot suspended in the oil despite longer drain intervals and increased soot loading
  • Exceptional resistance to thermal degradation, even under the most severe operating temperatures, prevents viscosity increase and the deposit formation and wear that can result
  • Superior anti-wear agents extend engine life despite high operating temperatures and extended service intervals
  • Higher starting TBN provides added protection against acid build-up that can cause rust and corrosion
  • Highly reliable performance over a wide range of temperatures, including severe cold


For product numbers and detailed packaging information, please click on the pack size listed on the right hand side of the page.


Inspection Data Typical Physical Properties of
MAG 1 Fleet SAE 40W
Viscosity @ 40°C cSt ASTM D445 124.5
Viscosity @ 100°C cSt ASTM D445 13.29
Viscosity Index ASTM D2270 101
Pour Point °C (°F) ASTM D5950 -27°C (-17°F)
Color ASTM D1500 2
Zinc, wt. % ASTM D5185 0.086
Specific Gravity @ 60°F (15.6°C) ASTM D4052 0.8783
Gravity, °API ASTM D287 29.61
Flash Point °C ASTM D92 210
Flash Point °F ASTM D92 410

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