Lucas Oil 10279 Gallon Engine Stop Leak, 3.785 Litre

Did exactly what it said it would, cured an oil leak on a combine.

Very effectively stopped a worn engine from consuming lots of oil. Very happy.

I was expecting very little from an "magic oil stop leak" product but it's actually not terrible. The bottle itself looks terrible and the instructions are....... ropey at best but it does genueinely seem to have reduced my oil burning. My valve seals have been letting oil past ever since I got my car but they are letting noticibly less oil though now. It's not a miricle fix, but it has made a difference, so for £15 I am happy to recommend this.

Great product

I had a major leak, added 1 liter to 3 liter oil , It changes the sound of engine it is smoother now, I am really surprised.It didnt help with the leak though. I don't know what could be the long term consequences but for the beginning I am happywith it.

Slowed a leak on my Mini but never stopped it, but with a Mini oil leaks are part of it charm...I'm told. Buy this but never buy a Mini🤣

Good quality item

Saved me about 10 grand

Mix in juiste ratio

واو كان لزوجة جيدة

I've used Lucas Oil products for years and swear by them. I just recently bought a 1997 Dodge Ram 2500 HD with a Cummins diesel and the mechanic I took it to for an inspection told me the engine had multiple leaks (didn't specify their severity). I just did my first oil change and substituted 2 quarts of oil for the Lucas Engine Stop leak and the engine is loving it. I will deep clean the engine and see if there's an improvement with the leaks. In future oil change I will substitute 1 quart of oil for this product as recommended by Lucas.

Works great

Well, I bought this because a mechanic put synthetic oil in my friend's 99 Buick LeSabre that had never had synthetic oil. The engine had 175,000 miles on it and never has seen synthetic oil. After running the synthetic oil for about 5,500 miles, a few drops were visible here and there. So, I figured that changing the oil back to organic oil and putting some of this in would fix the problem. I bought this in the winter, but I waited until we got hot weather to use this since I don't know how this will work during -0 degree F starts since it looks very thick. So after changing the oil and filter (using dinosaur oil), I put the whole quart in (I did not overfill). I figured that a 16 year-old engine with 180,000 miles might need to have all the o-rings and seals rehydrated (if that is what you want to call it. The GM 3800 series II stopped dripping the occasional drop after about 1 week. I will take it to the carwash to pressure wash the bottom side of the engine and degrease it, just to see if there is any new oil. But so far, the oil pressure does not seem any different and the oil stopped dripping. So take it from me, putting synthetic oil in an engine that has a lot of miles is not the end of the world. The mechanic put synthetic oil in it because there was the manifold antifreeze leak that could have gotten in the oil. So just in case, he used synthetic once he fixed the antifreeze leak and changed the oil. I do think that the synthetic oil cleaned out some deposits inside the engine. But it only started to leak a few drops, this oil treatment seems to have fixed the problem. I will try and see what happens after the oil is changed again. And, perhaps some can tell me if this would have been OK to use in winter, it sure was thick!