Case contains six 64 ounce (1/2 gallon) jugs of Stanadyne Diesel Fuel Additive Performance Formula. Each will treat 250 gallons of fuel. 8 OZs treat 30 gal buy in bulk, you ol IDI will thank you now and later! Stanadyne's brand boasts the following: more power and performance, improved cetane, and lubrication. It also cleans and protects your engine, while providing cold weather protection. It is compatible with ULSD and B20 and it can increase overall fuel economy. Stanadyne meets all diesel system requirements.

We keep this in our diesels and recommend to keep in your diesel fuel all the time! this is the best diesel additive we have found and tested. Performance formula raises your flash point, raises your freeze point and helps your water separator to remove water from your fuel system.