Starbrite Star-Tron Diesel Additive Starbrite Star Tron Enzyme Fuel Treatment is a multi-functional fuel additive which uses a unique enzyme technology that allows all engines to start easily and run smoothly, even after sitting idle for months. Star-Tron eliminates and prevents possible fuel problems. This additive breaks down excess water and sludge to sub-micron size, allowing it to be safely burned away during normal engine operation. Additionally, Star Tron increases fuel economy by cleanin