Edelbrock High Performance Zinc Additivesku:
Edelbrock's High Performance Zinc Additive is designed for hot rods, sports cars, muscle cars and exotics. This special formula of zinc, phosphorous and moly is the ideal chemistry to add wear protection to any motor oil. Because it won't rub, scrape or wear off, it is perfect for cold starts and infrequently driven vehicles. Also extends engine life and increases mileage and horsepower. One bottle treats up to 6 quarts/liters of oil.