Fleet · Mixed Fleet Oil
One Oil for a Mixed Fleet — AMSOIL Max-Duty 5W-30 (DHD)
Detroit wants DFS 93K222. Cummins wants CES 20086. Mack wants EOS-4.5 and Volvo wants VDS-4.5. Stock four oils and sooner or later the wrong one goes in the wrong truck. AMSOIL Signature Series Max-Duty 5W-30 (DHD) is formulated to meet all four, plus API CK-4, so one drum covers the yard.
Last reviewed: October 2026 · Based on AMSOIL data sheet G3467 (6/25) · Written by a Red Seal 310T truck and coach technician
Questions first? Call 888-490-0074 (toll-free)
For a Class 8 fleet running Detroit, Cummins, Mack and Volvo engines, AMSOIL Max-Duty 5W-30 (DHD) is the one oil that is formulated to meet every maker's spec: API CK-4, Detroit DFS 93K222, Cummins CES 20086, Mack EOS-4.5 and Volvo VDS-4.5. It cold-cranks at −30°C (−22°F). Each truck still runs its own engine maker's oil change interval. Run 15W-40 (DME) instead where trucks work at max weight in hot weather and you want the higher high-temperature film strength.
Diesel in the Yard
(−22°F)
DD13 Scuffing Test
Typical
Which Engines Can Run AMSOIL DHD 5W-30?
AMSOIL lists DHD for engines requiring any of the specs below. That covers every major North American heavy-duty engine maker, plus pickups and off-road and European equipment that most mixed fleets also run.
| Engine Maker | Spec Required | DHD Fits? | Engine Guide |
|---|---|---|---|
| Detroit DD13, DD15, DD16 | DFS 93K222 (CK-4) | ✓ Yes | DD15 → |
| Cummins X15, X12, ISX | CES 20086 | ✓ Yes | X15 → |
| Mack MP7, MP8, MP10 | EOS-4.5 | ✓ Yes | Mack → |
| Volvo D11, D13, D16 | VDS-4.5 | ✓ Yes | Volvo → |
| PACCAR MX-11, MX-13 | API CK-4 | ✓ Check grade | MX-13 → |
| International A26 · Caterpillar | International spec card · Cat ECF-3 | ✓ Check grade | A26 → |
| Ram Cummins pickups | Chrysler MS 10902 | ✓ Yes | — |
| European & off-road equipment | ACEA E6/E7/E9 · MB 228.31/228.51 · MAN 3275/3477 · Deutz DQC III/IV-10LA · Scania LA-2 | ✓ Yes | — |
"Check grade" means the spec is covered but confirm the viscosity. PACCAR calls for API CK-4 oil rather than a proprietary spec, and International publishes its own oil spec card. Both list the viscosity grades they want by temperature. PACCAR recommends 10W-30 for the MX-13. If your manual or spec card lists 5W-30 for your climate, DHD fits; if not, run Max-Duty 10W-30 (DTT) in those trucks.
Why Run One Oil Across a Mixed Fleet?
Whether the yard is tractor-trailers, transport trucks, dump trucks or pickups, one oil means fewer mistakes, less inventory and a cleaner oil analysis trend. When every truck runs the same oil, a change in a report points to the engine, not to whichever oil the shop grabbed that day.
No Wrong Oil in the Wrong Truck
One drum on the wall. Nobody has to know which spec goes in which tractor.
One Drum, One Price
Buy in drums or totes at commercial pricing instead of jugs of four different oils.
Cleaner Oil Analysis
Same oil in every truck means every report compares like with like.
Cold Starts Covered
Cold cranking at −30°C, where a conventional 15W-40 is rated to −20°C.
Pickups & Equipment Too
Ram Cummins pickups, off-road and European equipment specs are on the same data sheet.
A 2005 Cummins 5.9, a 7.3 Power Stroke and a Kubota skid steer. Three engine makers, three generations, one oil: DHD. It is also the grade AMSOIL put through Detroit's DD13 scuffing test as the worst case, and it delivered 6X more wear protection than the spec requires.
5W-30 (DHD) or 15W-40 (DME) for Your Fleet?
Both meet the same core heavy-duty specs. DHD flows better cold and covers more equipment. DME carries more high-temperature film strength (HTHS 4.5 vs 3.5) for trucks working at max weight in the heat. Pick by duty and climate, not by habit.
| Typical Property | DHD 5W-30 | DME 15W-40 |
|---|---|---|
| Viscosity @ 100°C | 12.0 cSt | 15.6 cSt |
| HTHS viscosity | 3.5 cP | 4.5 cP |
| Cold cranking (CCS) | 5,384 cP @ −30°C | 4,934 cP @ −20°C |
| Pour point | −43°C (−45°F) | −40°C (−40°F) |
| Viscosity index | 162 | 142 |
| TBN | 10.1 | 10.1 |
| NOACK volatility | 8.6% | 5.1% |
| Sulfated ash | 0.91% | 1.0% |
Typical values from AMSOIL data sheet G3467. Typical values are not specifications.
Run DHD 5W-30 When
- ✓ You run more than one engine maker
- ✓ Trucks start cold: Canada, northern US
- ✓ Pickups and equipment share the shop
- ✓ You want one drum and one oil analysis baseline
Run DME 15W-40 When
- ✓ Heavy-haul tractor-trailers at max weight, hot climate
- ✓ Older, higher-mileage engines with more clearance
- ✓ The manual's temperature chart doesn't list 5W-30
- ✓ Lowest volatility (NOACK 5.1%) is the priority
Two oils is still better than four. Plenty of fleets settle on DHD for the yard and DME for the heavy-haul tractors. Whatever you run, keep each truck on one oil so its oil analysis trend stays clean. AMSOIL does not support extended drains where oils have been mixed.
Does One Oil Mean One Oil Change Interval?
No. Each truck keeps its own engine maker's interval for its duty cycle. One oil simplifies the shelf, not the service schedule. AMSOIL's data sheet caps heavy-duty drains at 3X the OEM interval, not to exceed 60,000 mi, 600 hours or one year, unless oil analysis supports going further.
⚠ Where AMSOIL says not to extend drains with DHD. Performance-modified engines; biodiesel blends above B15; 2007–2009 Caterpillar C13 and C15 on-highway engines; and 2007–2010 Dodge, Ford and GM turbodiesel pickups. Run the OEM interval in those, and go past it only on oil analysis.
How Far Does a Drum of DHD Go?
A 55-gallon drum covers four to five Class 8 oil changes, depending on the engine. A 275-gallon tote covers 20 to 27. For a fleet, drums and totes on a commercial account cost less per service than jugs.
| Engine | Oil & Filter Change | Per 55-gal Drum | Per 275-gal Tote |
|---|---|---|---|
| Detroit DD13 | 40 qt (10 gal) | 5 services | 27 services |
| PACCAR MX-13 | 42 qt (10.5 gal) | 5 services | 26 services |
| Mack MP7 / MP8 | 44 qt (11 gal) | 5 services | 25 services |
| Detroit DD15 | 45 qt (11.25 gal) | 4 services | 24 services |
| Mack MP10 | 55 qt (13.75 gal) | 4 services | 20 services |
Commercial pricing, shipped direct anywhere in the US and Canada. Questions? Call 888-490-0074