Lucas Oil 10278 Engine Oil Stop Leak - 1 Quart

This product has been negatively reviewed far too many times, and I felt compelled to write a review on it. I have used this product on 3 cars with oil leaks, and my family has used it on their cars as well. My family has had great success with minor oil leaks, and 2 of my 3 cars I have used this on resulted in their oil leaks ceasing completely. My other car turned out to be a decent sized crack in my oil pan gasket, which explains why throwing some Stop Leak at it didn't solve my issue. This product helps greatly to repair old, hardened seals, but it doesn't falsely advertise to bring about miraculous results in moderate to major issues. My point is, this product works extremely well for it's intended purposes, and I feel that all of the negative reviews should be taken with an grain of salt. It would be spectacular to hear, from the negative reviewers, what sort of issues ended up being diagnosed in the cars this product didn't help. I'm by no means trying to put down the negative reviewers, but it does get a bit frustrating reading reviews on Amazon like "Put it in my car, didn't work, still leaking, crap product" or "I contracted a flesh-eating bacteria, and this 'highly rated' Neosporin didn't work. Don't waste your time. 1 star. Booooooo!!!!" Lucas Stop Leak is a great product for it's intended purposes, has been used and trusted by amateur and professional mechanics for years, and fully deserves a solid 5 stars.

I’m a Certified Auto Tech as well as Hyundai Master Technician with over 12 years of auto tech experience. I have seen it all used it all so many products claiming to stop leaks and improve fuel mileage and boost octane blah blah blah. Lucas stop leak actually works. Now you can’t expect it to work on a mechanical failure like rotted oil pan and broken gasket but it will stop or slow down seals and gaskets that are drying out or starting to fail. Most oil leaks are from going over your oil change intervals where the oil loses its additive properties and causes seals and gaskets to dry oil and crack. I find using Lucas stop leak with a decent high mileage semi synthetic or full synthetic oil is where it works best. Do not do what you could with older cars and use 10w30 or 20w50 oils thinking cuz it’s a thicker weight it will help. You will only damage your engine. Use the recommend viscosity or u can even go from a 5w30 to a 0w30. If in colder climates like myself in CT in winter I go with a 0w20 or 0w30 in my Acura with Lucas stop leak for better cold starts as this is wear most of engine wear occurs. So a thinner cold oil weight helps it circulate faster and oil pressure to rise faster protecting ur engines internals faster. With using Lucas I go 7500 miles on my oil changes on my 07 Acura TSX with 127k miles and the oil always comes out still clean a light brown. Had a small oil leak when purchased at 63k miles and has not gotten worse since the first oil change I did. I swear by Lucas products the fuel additive top end lubricant is also amazing and adds 2mpg on average to my gas mileage as well as a better cleaner running engine.

I like this product however it doesn't instantly stop your oil leak. I used it several times n still have my oil leak but it's not as bad now, so I will continue to use this product

I have a 2004 Toyota Highlander with about 70,000 miles. I noticed that the vehicle was leaking some oil. I couldn’t quite determine where it was coming from, so I asked a local shop if they could take a look at it for me. They gave me a quote of $129.00/hr just for the diagnostics and when it came time to the repairs it would be another $129/hr + cost of the parts. That’s when I decided to look for other options and came across this product. I’ve used other Lucas products in the past, but thought it was just hype since I didn’t notice much difference. However, when I used this product it actually did stop the leaking after using it for the first time. It takes maybe about two days for the leaks to completely seal, but after the first day I noticed that there wasn’t much oil leaking from underneath the vehicle. Then by the second day there was nothing. Not only did I save a lot of money, but my Highlander is now running smoother too. I’m planning to use another bottle on my next oil change, just in case.

Our 2008 Ford Escape with the 3.0L engine developed an oil leak from the Timing chain cover gasket and the repair estimate was $950 from a reputable repair shop. I decided to take a chance and ordered a quart of Lucas Stop Leak and performed an oil/filter change with the Lucas product added. The result is no more oil leaks with no more oil leaking onto the exhaust head pipe just ahead of the catalytic converter with the resultant burned oil odor entering the cockpit every time we come to a stop at an intersection. Nice!Now, I can hardly believe this myself but the Ford idles smoother, has noticeably more power and gets better fuel mileage. I've never been much of a believer in oil and gasoline additives but this product is magic in a quart bottle and our Ford will get a quart of this product at every oil change from now on. Thank you so much Lucas. I should also mention that we are the original owners of this Ford Escape so we know the vehicles history from day one.