A professional-grade stabilizer offers true professional protection against fuel degradation. Comes in pints or quarts, treating either 256 gallons or 512 gallons of either gasoline (GRI-G) or diesel (PRI-D).

PRI-G contains PRI's advanced thermal stability chemistry - the same used by commercial vessels and public utilities for maximum fuel protection. This means your fuel will stay fresh during long lay-up periods. Fuel systems stay clean and ready to go for quick starts and maximum engine reliability. Formulated specifically for small 2 and 4 stroke gasoline engines, PRI-G also prevents power-robbing carbon deposits. Your engine stays clean, running at maximum efficiency with optimum fuel economy. Simply add 2 ounces of PRI-G for every 5 gallons of fuel at each and every fueling. Add the same annually to keep fuel fresh. It also may be used at double strength to restore old, stale gasoline when mixed thoroughly with the fuel. Shelf life after opening in 3 years.

PRI-D is a super-concentrated, complete fuel treatment that improves all diesel fuels, including ultra-low sulfur diesel (ULSD), providing maximum fuel performance. PRI-D’s industrial strength, enhanced thermal stability chemistry react with fuel upon contact, providing multiple benefits: Engines perform better and last longer. Fuel lubricity is enhanced for reduced wear.