If I could help you improve your mpg 10-15% would you be interested, no equipment to buy. If you could get a free sample to try, would you use it, and at least give yourself a chance to save? All I ask in return is that you keep records on how much your save, what make, model, you are using my product in, and give me a detailed report I can show others who also want/need to save money. Contact me at improvempgmakemoney@yahoo.com