AMSOIL Signature Series Max-Duty Synthetic Diesel Oil | Maximum Protection
Maximum-Duty Protection for Your Hardest-Working Diesel Engines
Protect your investment in diesel power and confidently extend drain intervals with our top-grade synthetic diesel oil. AMSOIL Signature Series Max-Duty Synthetic Diesel Oil delivers 6X more wear protection, giving your diesel the extra protection it deserves.
Advanced synthetic technology provides excellent viscosity control and outstanding extreme-temperature performance while minimizing oil consumption. The result: protection that’s boosted to the max.
Choose Your Viscosity
Independent AMSOIL Dealer #1858536
Proven Performance Through Independent Testing
6X More Wear Protection
Wear on rings and cylinder liners leads to increased oil consumption and loss of compression, resulting in reduced horsepower and fuel economy. Third-party testing shows Signature Series Max-Duty delivers 6X more wear protection than required by the Detroit Diesel DD13 Scuffing Test for Specification DFS 93K222, delivering extra protection so you can push your diesel with peace of mind.
Test Results:
- Detroit Diesel DD13 Scuffing Test: 6X more wear protection than specification requires
- Severely scuffed liner vs. non-scuffed liner: Max-Duty prevents cylinder liner damage
- Maximum engine protection: Extends engine life and maintains compression
76% Less Oil Consumption
Signature Series Max-Duty has a low rate of volatility (burn-off), reducing oil consumption during operation and passing less oil vapor into the combustion chamber. It provides up to 76 percent less oil consumption than required by the API CK-4 standard in the Caterpillar-1N oil consumption test.
Superior Viscosity Control
Using top-tier synthetic base oils, Signature Series Max-Duty is naturally resistant to oxidation and the thickening effects of soot contamination. That, along with boosted detergent/dispersant additives, keeps soot particles suspended independently, helping prevent the formation of larger, wear-causing particles.
Viscosity increase is minimized and soot-related wear is controlled. Lower volatility also helps Signature Series Max-Duty Diesel Oil retain its viscosity after high-temperature service for maximum engine protection and efficiency.
60% Better Turbo Cleanliness
AMSOIL Signature Series Max-Duty Synthetic Diesel Oil provides protection boosted to the max, delivering up to 60% better turbo cleanliness and withstanding the extra demands you place on the turbo when pulling heavy loads or updating the tune for maximum horsepower.
2X Better Rust Protection
Provides up to 2X better rust protection in the NMMA FC-W Rust Test, protecting critical engine components from corrosion during storage and operation.
Extended Drain Intervals: Protection Guaranteed
AMSOIL Signature Series Max-Duty Synthetic Diesel Oil provides reserve protection, allowing you to go longer between oil changes:
Heavy-Duty On/Off-Road Applications
- Up to 3X OEM recommendation
- Maximum: 60,000 miles, 600 hours, or 1 year
- Whichever comes first
For commercial trucks, construction equipment, agricultural machinery, and other heavy-duty diesel applications.
Turbodiesel Pickup Trucks
- Up to 2X OEM recommendation
- Maximum: 25,000 miles or 1 year
- Whichever comes first
For personal and light-duty commercial pickup trucks with turbodiesel engines.
Gasoline Engines (Where Appropriate)
- Up to 2X OEM recommendation
- Maximum: 15,000 miles or 1 year
- Whichever comes first
Competition Use
- Provides lasting protection for multiple events
- Use oil analysis to determine appropriate drain intervals
Important Exclusions:
- Performance-modified engines
- Biofuels containing more than 10% ethanol or 15% biodiesel (B15)
- 2007-2009 Caterpillar C13 and C15 on-highway engines
- 2007-2010 Dodge, Ford and GM turbodiesel pickups (when using 5W-30 DHD)
Extend drain intervals beyond OEM recommendations in these instances only with oil analysis.
Important Notes:
- Use AMSOIL Oil Filters designed for extended drain intervals
- Always change filter when changing oil
- Check oil regularly to maintain proper fill levels
- Follow your owner’s manual for OEM drain interval recommendations and severe service guidelines
Excels in Extreme Temperatures
Signature Series Max-Duty Synthetic Diesel Oil resists thermal (heat) breakdown better than conventional and competing synthetic diesel oils. Unlike conventional oils, Signature Series contains no wax, staying fluid in sub-zero temperatures for easier starting, improved oil flow and reduced wear.
Signature Series 0W-40 (DZF) has a broad viscosity range that offers 4X better cold-cranking ability than a 15W-40 oil in the ASTM D5293 cold-cranking viscosity test, making it excellent for use in both hot-operating engines and cold-weather starting extremes.
Technical Specifications
Typical Technical Properties
AMSOIL Signature Series Max-Duty Synthetic Diesel Oil
| Property | 5W-30 (DHD) | 10W-30 (DTT) | 0W-40 (DZF) | 5W-40 (DEO) | 15W-40 (DME) |
|---|---|---|---|---|---|
| Kinematic Viscosity @ 100°C, cSt | 12.0 | 12.1 | 15.7 | 15.4 | 15.6 |
| Kinematic Viscosity @ 40°C, cSt | 72.3 | 78.2 | 92.8 | 94.5 | 116.4 |
| Viscosity Index | 162 | 151 | 180 | 173 | 142 |
| CCS Viscosity, cP @ (°C) | 5384 (-30) | 4858 (-25) | 5776 (-35) | 5555 (-30) | 4934 (-20) |
| Flash Point | |||||
| Fire Point | |||||
| Pour Point | -43°C (-45°F) | -42°C (-44°F) | -48°C (-54°F) | -43°C (-45°F) | -40°C (-40°F) |
| NOACK Volatility, % weight loss | 8.6 | 5.4 | 10.9 | 9.2 | 5.1 |
| HTHS Viscosity @ 150°C, cP | 3.5 | 3.5 | 4.2 | 4.3 | 4.5 |
| Total Base Number | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 |
Test Methods
- Kinematic Viscosity: ASTM D445
- Viscosity Index: ASTM D2270
- CCS Viscosity: ASTM D5293
- Flash/Fire Point: ASTM D92
- Pour Point: ASTM D97
- NOACK Volatility: ASTM D5800
- HTHS Viscosity: ASTM D5481
- Total Base Number: ASTM D2896
The typical properties listed above reflect the general characteristics of the product and are not manufacturing specifications. Variations that do not affect product performance should be expected. Product formulations are subject to change without notice.
Applications & Specifications
Diesel Engine Applications
- API: CK-4/SN, CJ-4, CI-4+, CF
- Volvo: VDS-4.5, VDS-3
- Mack: EOS-4.5, EO-O
- Renault: RLD-3, RLD
- Cummins: CES20086, CES20081
- Caterpillar: ECF-2, ECF-3, ECF-1-a
- Detroit Diesel: 93K218, 93K215, 93K214
- DFS: 93K222
- ACEA: E9, E7
- Mercedes-Benz: 228.31, 228.5
- MAN: 3575, 3677
- MTU: Type 2.1, Type 3.1
- JASO: DH-2
- Allison: TES439
- Deutz DQC: III-10 LA
- Scania: LA
Gasoline Engine Applications (Where Appropriate)
- Chrysler: MS-10902
- Ford: WSS-M2C171-F1
- Deutz: DQC IV-10LA
Trusted by Heavy-Duty Professionals
Professional drivers, fleet managers, and equipment operators rely on Max-Duty’s proven protection for their diesel investments.
“When you’re hauling heavy loads day after day, you need oil that can handle the punishment. AMSOIL Max-Duty gives me the confidence to push my equipment hard knowing it’s protected.”
— Professional Heavy-Duty Operator
Order AMSOIL Max-Duty Diesel Oil
Get maximum-duty protection with AMSOIL Signature Series Max-Duty Synthetic Diesel Oil.
Shop Max-Duty Diesel Oil at AMSOIL.com Independent AMSOIL Dealer #1858536
For wholesale pricing, contact National Synthetics about the Preferred Customer program and save up to 25% on all AMSOIL products.
Frequently Asked Questions
AMSOIL Product Warranty
Using AMSOIL synthetic lubricants does not void your new vehicle or equipment manufacturer’s warranty. All AMSOIL lubricants and filters are covered by the AMSOIL Limited Warranty. For complete information visit AMSOIL.com/guarantee.
Based on independent testing as documented in AMSOIL Data Sheet G3467. All trademarked names and images are the property of their respective owners. No affiliation or endorsement claim, express or implied, is made by their use.