Keep your diesel engine running at its best with Stanadyne Performance Formula! This is a bulk case of 24 individual 1/2 pint (8 oz) bottles, part number 38564. They're brand new, unused, and in original packaging. Made in the USA by Stanadyne, a leader in diesel fuel systems. This additive is designed for all diesel engines – from pickup trucks and SUVs to heavy-duty equipment and agricultural machinery. It helps improve fuel economy, increase power, reduce emissions, and prevent fuel system problems. It works by improving cetane, cleaning injectors, dispersing water, and providing lubrication for the fuel pump. Using it regularly can prevent costly repairs from clogged filters or corroded injectors. The 1/2 pint size is perfect for treating one tank of fuel (treats up to 125 gallons per bottle). The 24-pack is fantastic for fleet owners, farmers, or anyone who goes through a lot of diesel and wants to buy in bulk to save money. A trusted product used by professionals for decades. Whether you have a modern diesel with emissions systems or an older workhorse, this additive provides proven benefits. Protect your investment and optimize performance. Stock up with this convenient case!