Your car's engine needs a very specific diet of air and fuel to do its job, and it's the fuel pressure regulator's (FPR) job to feed it the right amount. The gadget is relatively tiny and can fit in ...

Single-trip fuel economy tests are notoriously difficult to do properly, and they require a level of precision that’s often beyond the means of most fleets. Fuel economy testing is notoriously ...

Fuel economy testing is a game of inches. Unless you're comparing a classic-style tractor and a bare-bones dry van to the latest aero tractor and slick, aero-festooned trailer, you're not going to see ...