Moopups, here is the product that I referenced above
this is a cut a paste
Heavy Truck Additives
You depend on a healthy truck in order to maintain a living. And just as you visit the doctor for scheduled check-ups, your truck visits the technician for scheduled maintenance. And the same way doctors know that vitamins and supplements can help promote healthy skin and bones, so technicians know that additives can help prolong the life of vital engine parts â helping your truck run longer and saving you from costly repairs. There are many types of additives available for different truck systems and different preventive maintenance
Products like CRC Industriesâ Siloo® Diesel Fuel Conditioner and Injector Cleaner stabilize fuel and add lubricity, but also contain detergents to clean injectors and eliminate deposits that form on injector nozzles. These clean injectors now have a restored spray pattern, which maximizes fuel economy and improves power
My only comment regarding the other post above is that the product worked for me! It is available through NAPA