One of the components that contribute to the cost of fuel are the federal and state taxes added to the price of each gallon at the pump. And state taxes vary across the country, with some U.S. states ...

A lot of drivers spend the majority of their time behind the wheel on smooth, comfortable, familiar tarmac — if they're lucky enough that the roads they commonly travel on are well-maintained, anyway.

Diesel particulate filter (DPF) retrofits ordered before the end of this month are sure to qualify for double the horsepower credit toward particulate-matter (PM) compliance with California’s In-Use ...