What's the difference between a parallel, series, and plug-in hybrid, and why do you need to know? Everything about the technology and the vehicles for the shopper or the merely curious.

You may have been doing some online vehicle browsing, been looking through your vehicle's owner's manual, or maybe you have just looked at your fuel cap door and noticed that there is something ...

Even if you don't plan on ever owning a car with a diesel engine, you may still want to know how they compare to gas engines in terms of costs and maintenance.