BTE Liquid Coolant Additive (Pint Plastic Bottle). NOT compatible with Long Life Organic Acid-based Coolant. For systems containing 40% to 60% Ethylene Glycol antifreeze. Pre-Charge treatment is one pint to each 4 gallons of cooling system capacity. (New heavy-duty antifreeze containing sodium nitrite needs no initial treatment.) Maintenance treatment is one pint for each 20 gallons of cooling system capacity. Every 12,000-15,000 miles or 300-350 hours of operation. Compatible with all Ethylene Glycol antifreezes.Stop sleeve cavitation erosion. Easy to use pint bottle, eliminates engine failure caused by cavitation, economical solution.