Cummins Logo International Logo
Contact UsRSSTwitterYouTube

ISX15 Improvements Since 2013

Cummins is committed to making continuous improvements to all of its products and services. As soon as a new or improved technology has passed our rigorous laboratory and field-testing, it is incorporated into new engine production and made available for service.

Shown below is a list of key product enhancements organized in three main categories – efficiency, maintenance and uptime – for your reference when working with customers.

Increased Fuel Efficiency – Minimizing Operating Costs

  • 2013 – Reduced parasitic losses from pumps, combined with enhanced low-end torque, enables downspeeding (cruising in a lower rpm range for better fuel economy). Enhanced efficiency delivered a 3.5% fuel economy gain.
  • March 2013 – The SmartAdvantage™ Powertrain optimizes shift strategies in conjunction with the SmartTorque2 (ST2) feature and the Eaton® Fuller Advantage® automated manual transmission, resulting in a 3-6% fuel economy gain. The SmartAdvantage™ Powertrain delivers best-in-class fuel economy validated by third-party SAE-type III testing and real-world experience.
  • 2014-2015 – Switching to a naturally aspirated air compressor (NAAC) and optimizing the use of Selective Catalytic Reduction (SCR) yielded a 1.5% fuel economy gain in line-haul applications, with up to a 2% improvement in regional-haul applications.
  • June 2015 – ADEPT™* technology with SmartTorque2 (ST2) and optional SmartCoast™ features deliver up to 3% improved fuel economy, with the greatest benefit in rolling terrain.

These are the major changes that took place affecting fuel efficiency. As illustrated in the chart below, the fuel-economy gains are cumulative, so a customer upgrading from a 2010 Cummins-powered truck can expect a total fuel-economy gain of as much as 13%. Customers replacing a 2012 Cummins-powered vehicle could experience a fuel economy gain of up to 11%.


*ADEPT™ is offered in non-SmartAdvantage packages, and can offer up to 3% fuel-economy improvement via ST2 and SmartCoast™ technologies.

Reduced Maintenance – Lowering Total Cost of Ownership

  • November 2014 – Diesel Particulate Filter (DPF) – Cleaning intervals for the DPF have been extended to as much as 400,000 miles in light-duty and normal-duty operation of 2015 engines. ISX15 engines built in 2013 and 2014 require DPF cleaning every 200,000 miles, but with a software update, the interval can be extend to 300,000 miles. While these are the recommended intervals, vehicles equipped with the latest Electronic Control Module (ECM) software (Phase can utilize the Maintenance Lamp as an indication of when the DPF needs cleaning, extending required maintenance beyond the published fixed intervals.
  • January 2015 – Coolant Filter Maintenance Made Optional – Enhanced manufacturing practices and better coolant technology have made it possible for customers to eliminate the coolant filter on ISX15 engines. Proper coolant must be used, and the coolant must still be properly checked and maintained. Eliminating coolant filter changes will save customers about $550 in maintenance costs over the first half-million miles of ownership. Customers can still specify a coolant filter if it is needed for the intended operating region and conditions.
  • January 2015 – LF14000NN Oil Filter With NanoNet® Media – Patented NanoNet media from Cummins Filtration provides better filtration of smaller particles, for more effective lubrication and better engine protection. At 10 microns the filter is 98.9% efficient. At the same time, it offers less restriction to lubrication flow, enhancing cold-weather protection to engine components. The LF14000NN oil filter is backwards-compatible for all ISX engines.
  • September 2015 – Maintenance-Free Crankcase Ventilation (CCV) Filter – The new Crankcase Ventilation Filter for the ISX15 employs variable impactor technology, and is maintenance-free, lowering the total cost of ownership for customers. This advanced filtration device was designed to fit into the existing coalescing filter housing. The new maintenance-free variable impactor filter is compatible with any ISX15 engine built in 2007 onward.

The chart below summarizes extended service intervals.


Increased Uptime – Keeping Trucks on the Road

  • April 2015 – Check Engine Lamp and Derate Reduction – Improvements in engine diagnostics software, simplified dash lamp logic and hardware improvements combine to significantly reduce engine dash lamp notifications and derate events. These improvements have led to 66% fewer fault lamp-driven service events for engines built since April 2015. Engines built prior to April 2015 can be updated with the latest software and achieve the same reduction in service events.
  • April 2015 – Connected Diagnostics™ – Connected Diagnostics provides real-time, expert diagnosis in response to urgent faults. Working with existing telematics providers, Connected Diagnostics analyzes fault code data, determines the severity of the problem, notifies of pending derates and helps customers locate a Cummins certified repair facility. Connected Diagnostics notifications enable real-time decision-making, maximizing vehicle uptime. Cummins is committed to continuous product improvement, and will continue to introduce upgrades as rapidly as possible to ensure that the ISX15 continues to provide best-in-class reliability, fuel economy and performance at the lowest total cost of ownership.

Back to the home page


Terms and Conditions  ©2022 Cummins Inc., Direct Marketing, Mail Code 60610, 500 Jackson Street, Columbus, IN 47201 U.S.A.

We use cookies on this site to enhance your experience. By clicking any link on this page, you give consent for us to set cookies. For more information, see our Privacy and Legal page

Got it!