Cummins Logo International Logo
Contact UsRSSTwitterYouTube

Natural Gas for Your Customer’s Application

The ISL G is the most popular natural gas engine in North America. Since it was introduced in 2007, the ISL G has become known for its impressive low-end torque and quiet operation. High torque ratings and a broad power band provide excellent performance in vocational, medium-duty and heavy-duty trucks.

The ISL G engine block is shared with the dependable Cummins ISL9 diesel – a full-skirted block for increased rigidity and strength. The design provides superior piston ring and bearing life, improved coolant flow and targeted piston cooling, for greater reliability and superior durability.

Features include Stoichiometric cooled Exhaust Gas Recirculation (SEGR), which is the ideal combustion process in which fuel and oxygen are completely consumed. This advanced combustion technology uses spark-ignited technology with a Three-Way Catalyst (TWC), which is a passive device packaged in place of a muffler, and is maintenance-free. The ISL G doesn’t require a particulate filter or a Selective Catalytic Reduction (SCR) system.

Ratings range from 250 hp to 320 hp (186-239 kW) with 1000 lb-ft (1356 N•m) of peak torque. The maximum GVW for the ISL G in line-haul tractor applications is 66,000 lb (29,937 kg), and is intended for applications operating less than 60,000 miles per year. Recommended gearing for optimal cruise in linehaul applications is 1750 rpm to 1900 rpm. For vocational applications, the recommended gearing is 1850 rpm to 2050 rpm.

The ISL G operates on 100 percent natural gas, which can be carried on the vehicle in either compressed (CNG) or liquefied (LNG) form. The ISL G can also run on renewable natural gas (RNG) made from biogas or landfill gas that has been upgraded to vehicle-fuel quality.

Visit for more information on the ISL G, or contact your distributor.

Back to the home page

Tags: ,

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!