In keeping with last month’s theme of testing multiple products rumored to have the same effect on vehicle performance, we’ve got our sights set on emissions this time around. Vehicles in most of the ...

For millions of Americans, regular emissions tests — sometimes called smog tests — are part of vehicle ownership. Thirty-one states and the District of Columbia have at least one county that requires ...

An EV doesn't have to pass an emissions test, but still requires an annual MOT after it reaches three years old. Here's how ...