Heavy Duty Engine Oils

Fleet SAE 20W-50

Fleet SAE 20W-50

Benefits of MAG 1 Fleet SAE 20W-50 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 20W-50
Viscosity @ 40°C cSt ASTM D445 141.7
Viscosity @ 100°C cSt ASTM D445 18.2
Viscosity Index ASTM D2270 144
Color ASTM D1500 2
Zinc, wt. % ASTM D5185 0.1
Phosphorus, wt. % ASTM D5185 0.0914
Calcium, wt. % ASTM D5185 0.966
Sulfur, wt. % ASTM D4951 0.231
Sulfated Ash, wt. % ASTM D874 1.03
Nitrogen, wt. % ASTM D4629 0.061
Specific Gravity @ 60°F (15.6°C) ASTM D4052 0.8747
Magnesium, wt. % ASTM D5185 0.0914
Cold Cranking Simulator at (°C), cP ASTM D5293 3282 (-15)
High Temperature / High Shear Vis at 150°C, cP ASTM D5481 4.7
Gravity, °API ASTM D287 30.27
TBN, mgKOH/g ASTM D2896 7.5

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