Track Your Mileage in Real Time
That is really not enough, although being aware of what your consumption looks like from tank-to-tank is important. Being aware of what mileage you're getting in real time--having the ability to compare it to everything you got or maybe 10 minutes ago--is your approach to drive. Ecomodding unites the love of adding gadgets and saving money. People with cars created after 1995 have it relatively easy: All you need to do is throw some money at a fuel-economy computer like the Scangauge, and you're instantly instrumented. For older cars, you might need to acquire your knuckles dirty by installing a vacuum gauge, which measures how hard the engine is working, or explore the developing universe of DIY fuel-economy electronics, like the arduino-based MPGuino. A conscious mind combined with comments, either way should get you that 10 percent.