Castrol GTX 10W40

Castrol GTX 10W40
Product Code: #5380421041

Product Description:

10W40 is a premium, super multigrade that provides maximum protection in all seasons and can help extend engine life. SAE 10W-40 exceeds API service SM, SL, SJ and SH as well as exceeding the engine protection requirements for API Certified Gasoline Engine Oils.


  • Engineered to provide maximum protection against viscosity and thermal breakdown! Anti-oxidants, detergents and dispersants provide unsurpassed protection against thermal breakdown.
  • Exceeds passenger car and gasoline light truck requirements for the protection of gasoline and turbocharged engines where API SM, SL, SJ or SH is recommended.
  • Castrol GTX exceeds demanding U.S. high shear and stay-in-grade requirements for viscosity breakdown protection.
  • Far exceeds the demanding U.S. requirements for viscosity breakdown in every grade!

Available in:

  • 1 Quart (#5380421041)
  • 1 Gallon (#5380121041)
  • 55 Gallon (#5385521041)

Density @ 15°C, Relative 0.875
Appearance Clear & Bright Amber Liquid
Viscosity, Kinematic 100°C 14.5 mm²/sec
Viscosity, Kinematic 40°C 100 mm²/sec
Viscosity Index 149
Viscosity, CCS -25°C (10W) 7000 cP max
Flash Point, PMCC 194°C
Ash, Sulphated 1.05% wt
Total Base Number, TBN 8 mg KOH/g
Castrol - New Label