CNG vs Diesel: Alternative Fuel Truck Comparison

CNG fuel costs 30-50% less than diesel on a per-gallon equivalent basis. For a truck burning 20,000 DGE annually, the fuel savings are $15,000-$25,000 per year. This is CNG's strongest economic argument.

CNG trucks produce significantly less NOx, particulate matter, and greenhouse gases than diesel. For fleets under regulatory pressure (California, Northeast states), CNG provides a cleaner alternative without the range limitations of electric trucks.

CNG trucks typically have 400-600 mile range depending on tank configuration, compared to diesel's 1,000+ miles. CNG tanks are also bulky and heavy, reducing payload capacity. This range limitation restricts CNG to return-to-base and regional operations.

CNG fueling stations are limited to major corridors and metropolitan areas. Diesel is available everywhere. The infrastructure gap is CNG's biggest barrier, essentially limiting the technology to routes with reliable CNG access.

CNG engines run cleaner, potentially extending engine life and reducing some maintenance costs. However, CNG fuel system maintenance (tanks, pressure regulators) adds complexity and cost not present in diesel trucks.