Bar's Leaks1010 Engine Oil Stop Leak Concentrate, 11 oz, 1 Pack, Grey

I used a ton of this S* in my Mountaineer before I realized that my F* oil sensor plug was actually leaking. $20 and 15 minute fix. However, I use this stuff in all my older vehicles and any seal leak stops after a week or so. Good S* ! A must for older motors. Good price.

Despite being skeptical on magical cure-alls I decided to give this a go. I had already sent the vehicle to the shop at least two times, and the vehicle was still losing oil. The loss was somewhat slow, after driving and letting it sit there would be about a half-dollar sized oil spot. I haven't had to add oil (yet) after a few months since the repairs on other old seals, but it was headed that direction again as the reservoir had fallen to about 50% of the hashed area on the dipstick in that time.I used a bottle of this Bars Stop Leak Concentrate, and almost immediately I noticed how much smoother and quieter the engine seemed to run, as in right after I added it and went about the rest of the day. It sounded different, but different in a good way.The first day, I noticed a significant improvement in the rate of oil loss. I literally had to get down and look at the driveway to spot the few drops of oil lost that dripped on a piece of gravel. By day two, I was not able to find the wet spot at all after combing through gravel so I stuck a piece of cardboard under the front and left it. Next day, I pulled it out. Bone dry. Not a drop of oil lost.I'm very impressed and satisfied with what this bottle did. We'll see how long it lasts, but it seems to have did exactly what it was supposed to do. But that having been said, my leak was most likely a very small one. This might not work on a larger leak with a lot of oil being lost.

kinda works temporarily

I was skeptical about the claims but not ready to replace rear main seal. Change oil adding this in and leak stopped after about 200 miles of driving. Very happy with that result. One thing to watch out for is the oil pressure dropped enough for gauge/warning light to come on during idle after warm up. Changed oil using no additive and oil pressure back to normal. Plan for a 2nd oil change sooner than usual as this additive will lower oil viscosity. But it was worth it.

After two bottles, added to my ford fusion, the leaks at the front crankshaft bearing seal and at the crankcase pan seal seem to have slowed, but not stopped.

As described and fast shipping. Stopped minor leak in a couple of days. This stuff swells and rejuvenates the seal IF it's not cracked.

So far so good. Have been checking the oil here and there with promising results

does nothing waste of money