Our unbiased reviews are based on consumer advocacy buying advice research and comparison mystery shopping. We examined the best vehicle service protection plans from the most popular auto extended warranty companies. Our team analyzed over three hundred vehicle service protection contracts and studied the fine print. We compared price quotes, features and the ease of use. Our mission is to match you with a trustworthy company that offers the most comprehensive plans and exceptional customer service. Our team concluded the best auto extended warranty company to be: CARCHEX. They offer a 30-day Money Back & Low Price Guarantee: You can request a full refund for a month after your purchase, for any reason. They also provide absolute transparency and no interest financing. CARCHEX is the smart choice.