Helps stop leaks due to drying, hardening or shrinking of engine oil seals and gaskets. Mixes with all factory approved engine oils including synthetics. Contains no particles that will clog oil passages or filters. Non-corrosive, non-clogging and non-foaming. Bars Leaks Stop Leak helps your engine last longer. Most leaks stop in 250 miles or 3 days of driving. One bottle treats 4 (four) to 6 (six) quarts of oil. To prevent future leaks, install stop leak every 6,000 miles.
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