Add Yahoo as a preferred source to see more of our stories on Google. Your DPF and DOC don’t fail overnight—they fail slowly, one idle session and one short trip at a time. Some think emissions system ...

One of the biggest ways drivers may be wasting gas is by driving fast, according to Consumer Reports.

(TestMiles) – With gas prices climbing toward four dollars a gallon as spring travel picks up, many families feel the pinch on their weekly budget during school runs, errands and weekend outings.