Shield®Classic

Conventional Passenger Car Engine Oil

Phillips 66®Shield Classic Motor Oil, SAE 20W-50 is a high-quality, conventional automotive engine oil recommended for use in gasoline-fueled passenger cars and light trucks operating under high-temperature conditions, such as towing heavy loads, where the vehicle manufacturer specifies an SAE 20W-50 engine oil. It also may be used in gasoline-fueled competition engines and high-performance street engines where SAE 20W-50 engine oil is preferred. It provides engine protection for both turbocharged gasoline direct-injection and conventional gasoline-fueled and flex-fueled passenger cars and light trucks under all operating conditions. It is not recommended for use in new cars under warranty.

Features & Benefits

  • Helps protect against low speed pre-ignition (LSPI) in turbocharged gasoline direct-injection engines (TGDI)
  • Resists viscosity and thermal breakdown at high temperatures
  • Protects against sludge and varnish formation
  • Protects against wear
  • Protects against rust and bearing corrosion
  • Good foam resistance

Applications

  • Turbocharged gasoline direct-injection and conventional gasoline-fueled light trucks and sport utility vehicles where an SAE 20W-50 engine oil is specified
  • Gasoline-fueled competition engines and high-performance street engines

Technical Details

Licenses & Approvals

Shield Classic Motor Oil is licensed for:

  • API service SN Plus
  • Backward serviceable for use where API SN or earlier "S" category engine oils are recommended

Additional Details
SAE Grade20W-50
Specific Gravity @ 60°F0.876
Density, lbs/gal @ 60°F7.29
Color, ASTM D15003.5
Flash Point (COC), °C (°F)230 (446)
Pour Point, °C (°F)-30 (-22)
Viscosity, Kinematic
cSt @ 40°C155
cSt @ 100°C19.6
Viscosity Index145
Cold Cranking Viscosity, cP6600
°C(-15)
High-Temp/High-Shear Viscosity, cP @ 150°C5
Sulfated Ash, ASTM D874, wt %1.05
Total Base Number (TBN), ASTM D28968.8
Phosphorus, wt %0.077
Zinc, wt %0.085