The CXW 200 EM12T is a mid-range heavy-duty diesel engine designed for commercial vehicles and industrial applications. It balances power output with operational durability, offering 350 horsepower and 1,250 lb-ft of torque. While it excels in torque delivery, fuel efficiency lags behind modern competitors due to its older turbocharging technology. Users report reliable performance in extreme conditions but note higher maintenance costs compared to newer engines.

The engine’s 350 horsepower and 1,250 lb-ft torque align with industry standards for Class 7 trucks, though it trails the Ford Powerstroke 730 (390 hp, 1,450 lb-ft) and Cummins X15 (480 hp, 1,800 lb-ft) in peak performance. Fuel efficiency data from the U.S. Environmental Protection Agency (EPA) shows the CXW 200 EM12T achieves 6.5 mpg in urban driving and 7.8 mpg on highways, 15% lower than the EPA’s 2023 average for heavy-duty engines. This gap stems from its single-turbo design, which struggles with optimal air intake at high altitudes. Independent testing by J.D. Power found the engine required 12% more fuel than the latest EPA-compliant engines to maintain equivalent power output. Durability metrics from SAE International highlight a 200,000-mile lifespan under normal use, matching industry averages but falling short of the 250,000-mile claims of newer Tier 5-certified engines. The CXW 200 EM12T’s emissions system meets 2010 EPA standards but lacks the advanced aftertreatment found in 2020+ models, contributing to higher nitrogen oxide (NOx) emissions. While it remains viable for regions without stringent emissions regulations, its fuel economy and emissions profile position it as a transitional engine in the evolving heavy-duty market.