http://www.bardahl.com/automotive/products/ring.htm
quote:
Bardahl has developed a means of dissolving deposits and keeping these deposits in suspension. Bardahl RING-EEZE contains patented chemistry to clean ring, valve, hydraulic lifter and other engine deposits. Major engine manufacturers such as Daewoo, Mazda, Fiat and Volkswagen recommend the use RING-EEZE chemistry to clean engine deposits. Bardahl RING-EEZE contains a blend of deposit removal compounds and detergent/dispersant chemistry to keep deposits from re-forming. RING-EEZE further is formulated anti-wear, friction modifiers that lubricate rings, cylinders and the valve train and inhibit further deposit formation.