Cummins X15 Engine Specs
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Based on the ISX, the Cummins X15 engine was created to produce additional horsepower, maintains efficient MPGs, and offers some of the longest maintenance intervals. If you need an engine that will do more for your business, you can’t go wrong with a X15 Cummins under the hood. Get the details of the Cummins X15 specs with International Used Truck Center below!
Cummins X15 Specs & Performance
When flexing its muscle the Cummins X15 can help you easily power over the hills and terrain that stand in the way of your destination, thanks to:
- X15 Efficiency Series- Produces 400 to 500 hp and 1450 to 1850 lb-ft of torque
- X15 Performance Series- Produces 485 to 565 hp and 1650 to 2050 lb-ft of torque
- X15 Productivity Series- Produces 430 to 605 hp and 1650 to 2050 lb-ft of torque
X15 Cummins Service Intervals
This renowned workhorse not only gives you the power you need to complete the job, it also keeps you on the roads longer thanks to its extended service intervals. Depending on amount of work your X15 Cummins does, you’ll be able to enjoy the following:
Oil Drain Intervals 8-12%
- Severe (< 5.5 mpg) – 25,000 miles
- Normal (5.5 to 6.5 mpg) – 35,000 miles
- Light (> 6.5 mpg) – 50,000 miles
Fuel
- Severe (< 5.5 mpg) – 25,000 miles
- Normal (5.5 to 6.5 mpg) – 35,000 miles
- Light (> 6.5 mpg) – 50,000 miles
Ash Clean
- Severe (< 5.5 mpg) – 250,000 to 400,000 miles
- Normal (5.5 to 6.5 mpg) – 400,000 to 600,000 miles
- Light (> 6.5 mpg) – 600,000 to 800,000 miles
DEF
- Severe (< 5.5 mpg) – 250,000 miles
- Normal (5.5 to 6.5 mpg) – 280,000 miles
- Light (> 6.5 mpg) – 300,000 miles
Valvetrain
- Severe (< 5.5 mpg) – 500,000 miles
- Normal (5.5 to 6.5 mpg) – 500,000 miles
- Light (> 6.5 mpg) – 500,000 miles

Drive Belts
- Severe (< 5.5 mpg) – 500,000 miles
- Normal (5.5 to 6.5 mpg) – 500,000 miles
- Light (> 6.5 mpg) – 500,000 miles
Breather
- Severe (< 5.5 mpg) – Maintenance free
- Normal (5.5 to 6.5 mpg) – Maintenance free
- Light (> 6.5 mpg) – Maintenance free
Find a Truck With the Cummins X15 at International Used Truck Center
Whether you want to find a truck equipped with a Cummins engine, or you need to speak with someone about choosing the right model, you can trust the experts at International Used Truck Center. Connect with us today!