If you like automotive services, I have seven ways to increase fuel mileage on gas and diesel vehicles. It is light duty mechanics, simple, fun, yet you can earn good income from each of them. 1. Throttle body modification: Increases power and 2-5 mpg. About 1.5 hrs. 2. Fuel Vaporizers: Installing a vaporizer kit on gas vehicles, about 2 hrs. 3. Installing voloperformance chips on OB2 port about 30 minutes. 4. Installing hydrogen fuel cells about 3 hrs. 5. Building and installing GEET plasma fuel on small engines such as lawnmowers, generators use 20% gas, 80% water, no carburetor. about 6 hours.

　　6. Making and selling Surface Tension Breaker Fuel additive, mix 10 bottles in about 30 minutes, sells for $10 each gains up to 25% fuel mileage gas or diesel. 7. Converting used motor oil to diesel save up to 50% fuel costs! Do this in your own garage or car port. .