Cummins X15 Equipment and specifications shown on this page have been republished from manufacturer website and are subject to change without notice. Consult your Inland dealer at time of ordering for standard and optional equipment. Visit our Cummins X15 Performance Series and Cummins X15 Productivity Series pages for more information on those engines.
Ease of Operation.
The Cummins X15 Efficiency Series makes every driver better. With access to ADEPT features on every Efficiency Series engine (compatible transmissions required) and the available of EX ratings – the X15 powered powertrain operates better than ever. Features like SmartCoast and SmartTorque 2 can be enabled without requiring a unique calibration, and EX ratings provide the next level of powertrain optimization with access to four unique powertrain electronic features.
Uptime.
The EPA2024 X15 Efficiency Series delivers more than just power and drivability. Rugged durability is ensured by the use of proven hardware while continuous improvements have resulted in reliability that provides peace of mind for trucking operations. With the best “Percent Zero Touch” and lowest “Touches Per Thousand” metrics to date, Cummins expects the trend to continue with the 2024 X15 product lineup.
The 2024 X15 gives you the confidence needed to improve your business without sacrificing anything.
Ratings
Called either “standard” or “straight torque” ratings, the following rating choices provide similar performance in all gears.
| Rating | Horsepower (Kw) | Peak Torque Lb-ft @ 950 RPM (n*m) |
|---|---|---|
| X15 450 | 450 (336) | 1650 (2237) |
| X15 450 | 450 (336) | 1750 (2373) |
| X15 450 | 450 (336) | 1850 (2508) |
| X15 500 | 500 (373) | 1650 (2237) |
| X15 500 | 500 (373) | 1850 (2508) |
SmartTorque (ST) ratings provide an additional 200 lb-ft torque in the top 2 gears, keeping drivers in the efficient gears longer.
| Rating | Horsepower (Kw) | Peak Torque Lb-ft @ 950 RPM (n*m) |
|---|---|---|
| X15 400ST | 400 (298) | 1450/1650 (1966/2237) |
| X15 400ST | 400 (298) | 1550/1750 (2102/2373) |
| X15 400ST | 400 (298) | 1650/1850 (2237/2508) |
| X15 450ST | 450 (336) | 1450/1650 (1966/2237) |
| X15 450ST | 450 (336) | 1550/1750 (2102/2373) |
| X15 450ST | 450 (336) | 1650/1850 (2237/2508) |
| X15 500ST | 500 (373) | 1650/1850 (2237/2508) |
Specifications
| Advertised Horsepower | 400-500 hp | 298-373 kW |
| Peak Torque | 1450-1850 lb-ft | 1966-2508 N•m |
| Governed Speed | 1700 RPM | |
| Clutch Engagement Torque | 1000 lb-ft | 1356 N•m |
| Number of Cylinders | 6 | |
| System Weight | 3,152 lb | 1,430 kg |
| Engine (Dry) | 2,961 lb | 1,343 kg |
| Aftertreatment System* | 191 lb | 87 kg |
Cummins X15 Maintenance Intervals
| Item | Severe < 5.5 mpg | Normal 5.5 – 6.5 mpg | Light >6.5mpg |
|---|---|---|---|
| DPF Ash Maintenance*** | 250,000 – 400,000 mi | 400,000 – 600,000 mi | 600,000 – 800,000 mi |
| DEF Filter | 300,000 mi / 6,750 hours | ||
| Valvetrain | 500,000 mi / 10,000 hours / 60 months | ||
| Drive Belts | 500,000 mi / 10,000 hours / 60 months | ||
| Crankcase Breather | N/A | ||
| HC Doser | N/A |
| Item | Severe < 5.0 mpg | Shorthaul 5.0 – 5.9 mpg | Normal 6.0 – 6.9 mpg | Light >7.0 mpg |
|---|---|---|---|---|
| Oil Drain Interval | 25,000 mi | 50,000 mi | 60,000 mi | 75,000 mi |
| X15 Oil Drain with Valvoline PB | 30,000 mi | 55,000 mi | 65,000 mi | 80,000 mi |
| X15 Oil Drain with Cummins OilGuard™** | extensions available | extensions available | extensions available | Up to 100,000 mi |
| X15 Fuel Filter* | 25,000 mi | 50,000 mi | 60,000 mi | 75,000 mi |
*For Premium Blue users, the Fuel Filter interval matches the ODI.