We see this with our fleet customers, our regular Grass Valley car pool drivers and our diesel truck drivers so it isn't just one type of driver that ends up with a nightmare on their hands costing thousands of dollars to repair, asking about the costs of a JASPER replacement engine! The fact is your driving habits and maintenance habits can easily avoid this issue! 6 EASY STEPS - Service, Tires, Don't Ignore Service Engine Lights, Keep it Clean & Stop Driving Crazy!