AMSOIL Signature Series Max-Duty 5W-40 Synthetic Diesel Oil
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The Most Popular Diesel Oil Viscosity
AMSOIL Signature Series Max-Duty 5W-40 is the most widely used viscosity in the Max-Duty diesel oil lineup. It delivers 6X more wear protection and is the go-to choice for Ford Power Stroke, GM Duramax, and Ram Cummins turbodiesel pickups.
Key Benefits
- 6X more wear protection than required by DD13 Scuffing Test
- Most popular diesel viscosity for modern turbodiesel pickups
- 76% less oil consumption than API CK-4 standard
- Extended drain intervals up to 3X OEM recommendation
- 60% better turbo cleanliness protection
- 2X better rust protection
Technical Specifications
| Property | Value |
|---|---|
| Kinematic Viscosity @ 100°C, cSt | 15.4 |
| Kinematic Viscosity @ 40°C, cSt | 94.5 |
| Viscosity Index | 173 |
| HTHS Viscosity, cP | 4.3 |
| Pour Point | -43°C (-45°F) |
| NOACK Volatility, % weight loss | 9.2% |
| Total Base Number (TBN) | 10.1 |
| Sulfated Ash Content | 0.99% |
Industry Certifications & OEM Approvals
API
- CK-4/SN
Cummins
- CES 20086, CES 20081
Detroit Diesel
- DFS 93K222, 93K218
Volvo
- VDS-4.5
Mack
- EOS-4.5
MB
- 228.31
Get AMSOIL Signature Series Max-Duty 5W-40 Synthetic Diesel Oil Today
Order directly through National Synthetics for Preferred Customer pricing and fast shipping.
SHOW MY PRICEIndependent AMSOIL Dealer #1858536
Frequently Asked Questions
Which diesel trucks use 5W-40 oil?
5W-40 is the most popular viscosity for modern turbodiesel pickups including Ford Power Stroke 6.7L, GM Duramax 6.6L, and Ram Cummins 6.7L. It's also widely used in medium and heavy-duty trucks. Check your owner's manual to confirm.
Independent AMSOIL Dealer #1858536. Product information sourced from AMSOIL. Visit AMSOIL.com for the most current product details and availability.