All modern engines need to have 10 W 30 oil. Emissions control devices such as the PCV and EGO valves need to be serviced when they fail. Proper tire inflation can add miles to tire life as well as minimize energy losses due to tire squirm. The owner's manual is a good source for preventive maintenance that can keep a vehicle capable of delivering its top fuel mileage. Encourage the students to familiarize themselves with the owner's manual for their automobile.
Many people never read the book supplied by the manufacturer.
There is an abundance of valuable fuel saving information in this book. Most fuel saving ideas will also extend the useful, trouble-free life of the vehicle. Maintenance habits and techniques are usually inherited from the person who teaches us how to drive or who has had the greatest influence on our attitude towards driving. Most average people cannot afford the replace their vehicles every three or four years. It may be interesting to get several in the class to discuss how reading their owner's book and performing necessary maintenance has saved or is projected to save fuel dollars.