Lucas Oil 10278 Engine Oil Stop Leak - 1 Quart

Within a week the little puddle behind the rear wheels was gone. Not reduced. Gone. The engine feels smoother now too and the idle noise dropped a bit, which matters when I’m taking calls in the car between meetings. One afternoon I pulled into a client’s office garage and realized there was no fresh oil mark where I had been parked the week before. That moment alone made me pretty glad I tried this stuff instead of booking an expensive seal job �

Help old cars run smoothly. We used it in a 2007 Honda pilot to help with an engine leak. High quality and works well!

Amazing product! My older car had a persistent rear main seal leak and was burning oil. After adding this during the last oil change, the dripping has completely stopped and the engine runs much quieter. Highly recommend giving it a try before spending money on expensive repairs.

I added Lucas Oil 10278 one-quart engine oil stop leak to my high-mileage SUV hoping to fix a slow oil weep from the valve cover gasket. It mixed smoothly with my full synthetic oil and slightly slowed the seepage after a few hundred miles. Sadly, it did not fully stop the leak as advertised. I still spot small oil puddles under the engine overnight. This additive is fine as a temporary band-aid for minor seal aging, but don’t expect it to replace a proper gasket repair for significant leaks. It’s a temporary solution only.

Wearing it during my last oil change made a noticeable difference. I traveled a few hundred miles and inspected the drip pan. Initially, there was a small amount of oil, but it remained dry the rest of the time. It seems to do a decent job of preventing leaks around the filter. I'm happy I decided to try it out.

My old pickup had a slow oil drip from the rear main seal for months. I added this Lucas Oil 10278 stop leak during my routine oil change. It safely rejuvenates aging rubber seals and mixes well with synthetic oil. After driving a few hundred miles, the persistent drip under the engine stopped completely. The one-quart bottle is the perfect amount for my engine. It also helps boost oil pressure and quiet noisy lifters. Saved me thousands on labor for seal replacement. I will keep this additive in my maintenance rotation.

Seems to be fine no real life saving results. Will probably discontinue use and just stick with diligence on change schedule.

I warmed up the engine, poured the whole quart in during an oil change, then checked the dipstick and driveway every morning for a week. The leak did not vanish overnight but the spots shrank a lot after a few days. By the second week my concrete was basically clean. That alone made me glad I tried it. I still keep a close eye on the oil level and I carry a shop towel in the trunk out of habit. This is not a fix for a totally blown gasket, but for my slow seep around the rear main seal it works well enough that I can push off a big repair. I also notice the engine runs a bit smoother at idle, which is nice when I am sitting outside a client’s office with the AC on while exporting design files on my laptop.

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