With so much aftermarket power-adding equipment available, we just couldn't leave well enough alone. It started with wanting to add just enough power to our '01 dualie so the transmission wouldn't ...

"Propane is the fuel of the gods," according to Hank Hill from the television show King of the Hill. Well, we would have to agree with Hank's enthusiasm for the wonder-gas, especially when it comes to ...

Propane could be competitive with diesel as a cost-saving, energy-efficient fuel for large trucks and school buses, say Colorado State University mechanical engineers awarded a $3.5 million U.S.