All new vehicles sold in America come with at least two auto warranties, and many include roadside assistance coverage. Described below are the major types of warranties and assistance provided to consumers.

5 Things That Will Void Your Coverage

In these days of $4 gasoline, automakers create a lot of noise about their cars that get 40 miles per gallon. The problem is, this usually means 40 mpg on the highway as rated by the EPA. And except for Hyundai, which has a pretty full lineup of fuel-efficient qualifiers, the 40 mpg club is composed mainly of specially equipped, limited-production, high-efficiency models.

Make Sure You Get What's Coming to You

The era of hybrids has arrived, and more than two dozen models in the U.S. auto market use a combination of a battery pack and a gasoline engine for propulsion. As the hybrid market matures, technological advancements — including further mileage gains — have become only incremental, and some new offerings are disappointing "me-toos." This makes careful shopping important.

What could a Toyota Prius possibly have in common with a Cadillac Escalade, Chevy Silverado or Ford Fusion? Each is available with a hybrid powertrain, a propulsion system made famous by the Prius. While consumers benefit from the improved fuel economy, hybrids give automakers a way to meet ever-tightening Corporate Average Fuel Economy (CAFE) requirements and proposed limits on carbon dioxide (CO2) emissions.

Flawless Demo Supports Founder's Mission-Driven Vision

A lot can change in one year. In May 2008, we had the idea to bring four frugal, fuel-sipping cars together to determine which was the most fuel-efficient and the cheapest to run, and which did better in specific driving conditions. While the EPA's fuel economy estimates are a good guide for determining a car's overall thirst for fuel, we wanted to do our own controlled testing to see how different types of cars performed in the real world.

MPG Gauges Can Help Save Fuel, Money and the Environment

The Cars Are Better Than Ever, but Diesel Is Still a Tough Sell