I am writing to let you know how astonishingly...well the Engine Conditioning Unit is working on my 1993 Ford Ranger. My husband installed the unit one month ago today and the fuel mileage has increased by 33%. This increase was achieved by the third fuel fill up.  Deborah-Baltimore,  MD  Although I am now retired from the State as Vehicle Maint. Supv, Hattiesburg District, I still use your products on my personal vehicles and highly endorse to all people who wish to obtain better fuel mileage, and have more overall engine performance. They should buy PowerPac or DieselPac products. I am satisfied with mine and I know they will be too.Versie Thompson-MS One unit was installed on a 2006 Ford Expedition City driving. The unit increased the MPG by 14.7%. The road officer explained the unit gave the Expedition an increase in engine performance, both response in acceleration and smoothness in the engine itself.  Hancock County Sheriff's Department  I have an 1998 Honda Accord and I had the PowerPac ECU installed 2 months ago. My fuel mileage has increased by 23%. I think that it is important to note that my car has more power immediately after the installation. You barely have to press on the gas and you go.  Cynthia-Noble OK I am writing to let you know how thrilled I am with my Fuel Saving Power Pac. From the very beginning I noticed the difference when I stepped on the gas! So much more power and the gas savings is Awesome. Knowing I am helping the environment makes me feel like I am contributing to clean air. I just wish every vehicle I see on the highway had a Power Pac or Diesel Pac would definitely be a breath of fresh air.  I will be recommending it to everyone I know. Thanks again.  Joan Kelly-Dallas TX