ATTENTION RED LINE OIL CUSTOMERS: Please be advised that we are not accepting walk-in customers at our Benicia office at this time due to COVID-19. You may place an order at or call us at (707) 745-6100. All orders will be shipped to your requested address at our standard shipping rate. We apologize for the inconvenience and hope to open our doors again to you in the near future. Thank you for supporting Red Line Oil, we appreciate your business.

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Professional-Series 5W40 Diesel Motor Oil

Professional-Series 5W40 Diesel Motor Oil

Professional-Series 5W40 Diesel Motor Oil

  • Full-synthetic, OEM-certified formula designed for use in newer low-emission diesel engines as well as older diesel applications equipped with exhaust after-treatment devices operating under extreme temperature conditions
  • Provides outstanding protection against abrasive wear and soot-induced oil thickening
  • Formulated to keep engines clean by providing protection against soot and deposits
  • Helps to protect exhaust after-treatment systems from degrading and loss of efficiency
  • Protects against rust, bearing and engine wear
  • Approved for API CK-4, CJ-4 and CI-4 Plus
  • Recommended for ACEA E9-08/E7-08, Ford WSS-M2C171-F1, Mercedes-Benz Sheet 228.31, Cummins CES 20086, Caterpillar ECF-3, ECF-2, ECF-1-a, Detroit Diesel DFS 93K222, MACK EOS 4.5, Renault RLD-4 and Volvo VDS-4.5
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  • FULL SYNTHETIC -- OEM-required Group III/Group IV PAO Base Stocks
  • Lower volatility for reduced oil consumption
  • Long-life certification for improved wear protection following factory drain intervals
  • For high- and low-mileage engines
  • Compatible with conventional and synthetic oils
  • Withstands extreme temperatures

You asked for it: OEM-approved Red Line products, for gasoline and small Diesel engines.

Typical Properties

ACEA Service Class E9-08/E7-08
API Service Class CK-4/CJ-4/CI-4 Plus/SN
SAE Viscosity Grade (Motor Oil) 5W-40
Vis @ 100°C, cSt 14.5
Vis @ 40°C, cSt 96.0
Viscosity Index 166
CCS Viscosity, Poise, @ °C 62@-30
Pour Point, °C -48
Pour Point, °F -54
HTHS Vis, cP @150°C, ASTM D4741  4.2

Available Sizes

Quart 12714
Gallon 12715
55 Gallon* 12718

*Only available from our dealers

Approved For:

API CK-4/CJ-4/CI-4 Plus

Suitable Replacement For:

ACEA E9-08/E7-08

Caterpillar ECF-3
Caterpillar ECF-2
Caterpillar ECF-1-a
Detroit Diesel DFS 93K222
Ford WSS-M2C171-F1
Mercedes-Benz Sheet 228.31
Renault RLD-4
Volvo VDS-4.5