If North American natural gas prices continue to remain at today’s historically cheap level compared to oil prices, and if compressed natural gas (CNG) and liquefied natural gas (LNG) refueling is conveniently available, then diesel truck fleets could indeed save money by switching to CNG or LNG, according to a Conference Board of Canada study released April 24.

While a gas-powered truck costs about US$80,000 more than an equivalent diesel truck, the fuel savings on CNG or LNG would total about $150,000 over 10 years – even after paying the ...