Detroit (Daimler Truck)
Detroit DD16: Specs, Service Intervals, Lifespan & Common Problems
The Detroit DD16 is Detroit's largest on-highway engine. It is a 15.6-liter inline-six that makes 500–600 hp and 1,850–2,050 lb-ft. Detroit's page lists the Gen 5 DD16 for the Freightliner Cascadia and the Western Star 49X. We could not find a North American DD16 spec sheet. The 45 qt oil fill and the 2,837 lb dry weight come from Detroit's sheets for Australia and New Zealand.
Detroit (Daimler Truck) published the Detroit DD16 figures in its own documents. Last reviewed November 3, 2026.
What are the Detroit DD16 specs?
| Configuration | Inline 6-cylinder |
|---|---|
| Displacement | 15.6 L |
| Power and torque (Gen 5, North America) | 500–600 hp, 1,850–2,050 lb-ft |
| Bore × stroke (Australia/NZ sheet) | 5.47 in × 6.73 in (139 mm × 171 mm) |
| Compression ratio (Australia/NZ sheet) | 17:1 |
| Dry weight (Australia/NZ sheet) | 2,837 lb (1,287 kg) |
| Oil and filter service fill (Australia/NZ sheet) | 45 qt (43 L) |
| Hardware Detroit highlights | Turbo compounding, an integrated Jacobs engine brake with three levels, and the amplified common rail fuel system |
Fitted in the Freightliner Cascadia and Western Star 49X; compare with the truck model specs.
How long does a Detroit DD16 last?
Detroit's DD16 pages do not state a design-life mileage or North American warranty terms, so this page does not print either. Detroit does call the DD16 the largest on-highway engine it builds. That is a size claim, not a durability claim. Get the warranty for your truck in writing.
Warranty, as the OEM lists it
- Not stated on the Detroit DD16 pages we read. Confirm coverage in writing for the specific truck
Detroit DD16 oil capacity: how much oil does it hold?
45 quarts (43 liters) for an oil and filter change, as Detroit lists it on its DD16 sheets for Australia and New Zealand. We could not find a North American DD16 sheet, so check your operator's manual before you buy oil.
Capacity is how much oil goes in. The interval is how often you change it. The next section covers the interval.
How often should you change the oil in a Detroit DD16?
We could not read Detroit's North American oil interval table for the DD16, so this page does not print one. Detroit's DD16 sheets for Australia and New Zealand list kilometers and hours for local duty cycles. Those do not carry over to U.S. trucks. Use Detroit's operator's manual for your engine.
- On Detroit's DD15 Gen 5 sheet, the oil interval depends on annual miles and mpg. See the DD15 guide for that table. Do not assume the DD16 uses the same numbers.
- Detroit's Australia and New Zealand sheets list the oil and filter fill at 45 qt (43 L). Confirm the fill for your engine in the manual.
Put your Detroit DD16 interval on a schedule with the maintenance scheduler.
What should you check before you buy a used truck with a Detroit DD16?
- Ask for service records. The Detroit (Daimler Truck) documents we read do not give an oil interval table, so confirm the interval for that truck in its owner's manual.
- Get the warranty terms in writing for that exact truck. The documents we read do not state them.
- Check recall status by VIN. We have not searched recalls for this engine.
What are the common problems with the Detroit DD16?
We found no repair report that is specific to the DD16 that we could rely on. Parts sellers mention injector wear and emissions-system buildup. They sell those parts and give no mileage pattern. So this page lists none. Use EGR, turbo and aftertreatment as a general inspection list on any used truck.
How does it compare with other heavy-duty engines?
Each engine guide on this site follows the same format and the same sourcing rule, so you can read theDetroit DD16 next to the other engines.
Frequently Asked Questions
How much oil does a Detroit DD16 hold?+
45 quarts (43 liters) for an oil and filter change, as Detroit lists it on its DD16 sheets for Australia and New Zealand. We could not find a North American DD16 sheet, so check your operator's manual before you buy oil. That tells you how much oil to buy. The service interval tells you when to change it, so read both.
How much horsepower does a DD16 have?+
Detroit lists the Gen 5 DD16 at 500 to 600 hp and 1,850 to 2,050 lb-ft of torque. The top rating is 600 hp with 2,050 lb-ft.
How many liters is a DD16?+
15.6 liters. Detroit calls it the largest on-highway engine it builds. It is about 952 cubic inches on Detroit's sheet for Australia and New Zealand.
What is the difference between the DD15 and the DD16?+
On Detroit's sheets, the DD16 is bigger. It is 15.6 liters against 14.8. Both list a 5.47 in (139 mm) bore. The DD16 stroke is 6.73 in (171 mm) against 6.42 in (163 mm). Detroit lists 500–600 hp for the DD16 and 425–505 hp for the DD15 family. The dry weights are 2,837 lb and 2,718 lb. The DD16 weight comes from the sheet for Australia and New Zealand.
Is the Detroit DD16 a good engine?+
It is built for heavy loads, and Detroit lists up to 600 hp. Detroit's pages state no design life, and we found no engine-specific repair data we could rely on. So we cannot rate it. For heavy haul, match the rating to your gross weight and check the service record.
How often should I change the oil in a DD16?+
We could not read Detroit's North American interval table for the DD16, so we do not print a number. Use the operator's manual for your engine and your real duty cycle. Heavy loads and idle time usually call for a shorter interval, not a longer one.
Sources
Run a Detroit DD16 truck? Let a dispatcher handle the rest.
Grow Trucking finds loads, negotiates rates and does the paperwork for owner-operators and small fleets. Tell us about your Detroit DD16 truck and we will show you how we can help.
Also: About Grow Trucking · Refer a carrier · Trucking blog
Specs, intervals and warranty terms for the Detroit DD16 change by model year and configuration. Confirm the exact figures for a specific truck against Detroit (Daimler Truck)'s current documents and your written warranty before you make a purchase or maintenance decision. Reported-issue information comes from repair and parts businesses, not from an independent failure study.
Free tools for a Detroit DD16 truck
Decode Detroit DD16 fault codes, keep its service on schedule and check a truck before you buy.
- Diesel Fault Code Lookup (SPN/FMI)Decode the SPN/FMI fault codes the Detroit DD16 reports.
- Preventive Maintenance SchedulerTrack Detroit DD16 oil and filter intervals by odometer for your duty cycle.
- Breakdown Cost EstimatorEstimate what a Detroit DD16 breakdown costs in repairs and lost revenue.
- Truck Breakdown TriageIf the Detroit DD16 shows a red lamp or overheats, see if you should stop now.