LOS ANGELES -- In publicity for its Prius hybrid-electric vehicle, Toyota Motor Corp. claims the compact sedan is EPA-certified to get 51 mpg on the highway, 60 mpg in the city and 55 mpg in a ...

Every now and then, EPA gas-mileage ratings--and cars that notably fail to achieve them in real-world use--burst into public awareness. Hyundai and Kia had to agree to reduced ratings and send refunds ...

In a letter to auto manufacturers Friday morning, the Environmental Protection Agency cracked down on so-called "cheat devices," the insidious software at the heart of the Volkswagen scandal. How?

In response to an independent range test, Tesla has reportedly claimed that the EPA range on its vehicles can be achieved by draining the battery pack beyond the zero-mile displayed range. Last month, ...

ARLINGTON, VA — The Air Conditioning Contractors of America (ACCA) announced the release of ACCA’s updated Section 608 certification test required by Environmental Protection Agency (EPA) and new ...

Elon Musk claimed this week that a botched test by federal regulators hurt the Tesla Model S's official range estimate. "When we did the last EPA test, unfortunately, EPA had left the car door opened ...

We've heard it for years, we all know it's true, and yet we put our trust in the EPA's fuel-efficiency ratings as a guide to what kind of gas mileage a car will really get. Now, two cars--the 2013 ...

The advertised fuel economy of a gasoline-powered vehicle is nothing more than an estimate, which can differ a lot due to the driving cycles used to measure fuel consumption. Discrepancies further ...

The Environmental Protection Agency has released a method for measuring PFAS contamination in high density polyethylene containers, a step the agency said will allow industries that use fluorinated ...

The fallout from Volkswagen's emissions cheating continues, with the US Environmental Protection Agency now planning to test every diesel from every manufacturer. VW's admission that its cars would ...