Stanadyne is the only fuel system manufacturer in the world to market its own range of diesel fuel additives that are specially formulated for low sulphur fuels. Stanadyne diesel fuel additive is the only independent diesel fuel additive brand tested and approved by many of the world's leading engine and vehicle manufacturers. Experts in diesel servicing recommend Stanadyne diesel fuel additives. We not only recommend Stanadyne diesel fuel additives to our customers, we use it in our own vehicles. In addition, independent testing has shown that using Stanadynes Performance Formula will increase fuel economy and power while extending the life of your diesel fuel injection system.