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A replacement battery in a used EV can change its warranty and value. Here's what to verify before you buy and what coverage may remain.

You thought you scored a great deal on a used car. Then you discovered it had been in a serious collision, something the seller conveniently forgot to mention. Suddenly, that bargain looks considerably less appealing. But can you get your money back?

Discover whether fuel additives actually improve engine performance, fuel economy, and longevity, or if your mechanic is right that these popular gasoline treatments are simply a waste of money.

Eight-track players were once expensive car options that transformed road trips. Remember the cartridges, clicking sounds, and unforgettable music?

These 25 muscle cars once ruled 1970s streets but are rarely spotted today. Remember their roaring V8 engines, bold styling, and legendary power?