Beyond Every Expectation.

For customers wanting the ultimate in performance from their premium motorhome, the engine of choice is Cummins ISX15 – the most popular heavy-duty engine sold in North America.  It is rated at up to 600 horsepower and 1950 of peak torque, making it ideal for even the largest,most heavily equipped units.

Its XPI fuel system delivers a precise quantity of fuel at ultra-high pressures. This allows multiple injection events per cycle. This, together with enhanced turbocharging and reduced power demand from external engine components delivers the ultimate combination of industry-leading fuel economy along with quiet, smooth acceleration. Best-in-class braking (up to 600 bhp) is accomplished through the Cummins Intebrake, which delivers greater vehicle control while reducing service brake wear.

The ISX15 maintenance schedule has been significantly improved over the last decade, with oil and oil filter changes, valve adjustments and fuel filter changes now recommended at twice the mileage of our 2010 engine. This, together with an increase in fuel economy of up to 2 percent, lowers total operating costs over the life of your motorhome.

Plus, when it’s time to trade up to a newer model, Cummins-powered motorhomes deliver traditionally higher resale value.

A Cummins-designed and manufactured aftertreatment system is fully integrated and now includes on-board diagnostics that continuously monitor engine and aftertreatment performance to ensure near-zero emissions.

All of this is backed by unmatched support, from the largest service network in North America. This includes exclusive programs like Coach Care™ and 24/7/365 assistance from your Cummins Care representatives at 1-800-CUMMINS.

For Cummins-branded merchandise, electronic tools, literature and more, visit the Powerstore.

Features & Benefits

XPI Fuel System – Delivers superior performance at every speed. Multiple injection events per cycle improve fuel efficiency and enable smoother, quieter operation.

VGT™ Turbocharger From Cummins Turbo Technologies – The patented design is widely recognized as the industry leader for performance. Electric actuation provides quick throttle response and increased braking horsepower.

Cooled EGR – Next-generation system lowers combustion temperatures for reduced emissions and optimized fuel economy.

High-Capacity Electronic Control Module (ECM) – A single ECM manages the entire engine and aftertreatment system for optimum performance and fuel economy. This ECM is used across the board for Cummins on-highway engines, to simplify servicing

Intebrake – The standard internal engine braking system delivers best-in-class braking horsepower (up to 600 bhp) for greater vehicle control with reduced service brake wear.

Cummins Aftertreatment System From Cummins Emissions Solutions – The proprietary system consists of a Diesel Particulate Filter (DPF) and Selective Catalytic Reduction (SCR) technology for near-zero emissions.

Fleetguard^® Fuel Filters, Lube Filters And DEF From Cummins Filtration – Fleetguard filters protect against corrosion and contaminants that can cause performance issues. High-quality Diesel Exhaust Fluid (DEF) is widely available at authorized Cummins and Fleetguard locations.