I had my 2000 Toyota Rav4 serviced about a week ago and was advised to use this Sea Foam Motor Treatment to clean my intake manifold. After reading reviews online, people have given this thing excellent reviews. Some people had their check-engine light on and after using a bottle of Sea Foam, it cleared the problem. I don’t have a check-engine light, but the engine on the Rav4 does sound cleaner and quieter when it’s running. I’m hoping it improves the gas mileage.