Engine Oil Stop Leak 1 Gallon

Lucas Oil Engine Oil Stop Leak is a specialized motor oil additive formulated to seal internal engine leaks and restore compression in aging or high-mileage engines. Designed for both civilian and fleet operators who need reliable, cost-effective maintenance solutions, this 1-gallon jug addresses one of the most common sources of engine degradation: slow oil seepage from worn seals and gaskets. Whether you're managing a personal vehicle, a work truck, or tactical support equipment with internal combustion engines, Engine Oil Stop Leak works to extend engine life without requiring complete overhaul or seal replacement.

The additive chemistry of Lucas Oil Engine Oil Stop Leak penetrates worn seals and restores their pliability, allowing them to reseal against journal surfaces and prevent oil loss. Unlike temporary sealants, this formula works with your existing motor oil to condition and soften elastomer components that naturally harden with age and heat cycles. The formulation is compatible with conventional, synthetic, and blend motor oils across a wide range of viscosities, making it suitable for diesel and gasoline engines alike. A single 1-gallon container treats approximately 5–6 quarts of crankcase capacity, providing economical coverage for single-engine systems or staged application across multiple units.

Field personnel, mechanics, and equipment managers benefit most from Engine Oil Stop Leak when preventive maintenance is required before a complete oil system overhaul becomes necessary. Simply pour the full 1-gallon jug into the engine crankcase during a routine oil change or top-up cycle; no draining or flushing is required. Results typically appear within 500–1,000 miles of normal operation as the additive conditions seals and reduces visible seepage. This product is ideal for tactical vehicle fleets, emergency service equipment, and any engine-powered system where unexpected downtime due to oil loss is unacceptable.