Heavy Duty Engine Oils

Fleet SAE 15W-40

Fleet SAE 15W-40

Benefits of MAG 1 Fleet SAE 15W-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 15W-40
Viscosity @ 40°C cSt ASTM D445 118
Viscosity @ 100°C cSt ASTM D445 15.7
Viscosity Index ASTM D2270 141
Pour Point °C (°F) ASTM D5950 -36°C (-33°F)
Color ASTM D1500 3
Zinc, wt. % ASTM D5185 0.127
Phosphorus, wt. % ASTM D5185 0.115
Calcium, wt. % ASTM D5185 0.105
Sulfur, wt. % ASTM D4951 0.32
Sulfated Ash, wt. % ASTM D874 0.99
Nitrogen, wt. % ASTM D4629 0.105
Specific Gravity @ 60°F (15.6°C) ASTM D4052 0.8770
Magnesium, wt. % ASTM D5185 0.1
Cold Cranking Simulator at (°C), cP ASTM D5293 5800 (-20)
High Temperature / High Shear Vis at 150°C, cP ASTM D5481 4.2
Noack Volatility, % loss ASTM D6375 12
Pumping Viscosity at (°C), cP ASTM D4684 20,000 (-25)
Gravity, °API ASTM D287 29.85
TBN, mgKOH/g ASTM D2896 10
Molybdenum, wt. % ASTM D5185 0.0066
Total Acid Number, mgKOH/g ASTM D664 2.9

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