Don't Fall For Gimmick Gas Saving Devices That Don't Work

1. How do I fix My 2015 Jeep Cooling Fans? Do they work? 2. How can I stop Vapor Lock on a 1951 Chevy? 3. Do Hydrogen Fuel kits for cars really work?  4. How do I add Cruise Control to a truck or car? 1987 Chevy Truck. 5. Why wont my truck come out of park? 6. Why does my car only start with jumper cables? 1995 Mustang Ford.