BlueDevil has a 95% success rate and is 100% guaranteed. BlueDevil is an easy 4-step process that only takes 2 hours to complete. Other products on your shelf take 2 days to install. BlueDevil is intended for the customer who can’t afford the hard-part repair or for low-value cars that aren’t worth fixing. BlueDevil is compatible with water and antifreeze, and can be used in both gas and diesel engines.