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Global ratings 45
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    25
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Type of review

Revainrating 5 out of 5

New flash, it worked!

So, 800 miles in and the leak appears to be gone. I cleaned the area prior to adding the product on the next oil change. I have re-inspected several times and there is zero sign of leaks. I have to say that i was skeptical but it appears to have worked. It is very thick so pack some patience when pouring it in the motor. I just stood it up and walked away.

Pros
  • Provides protection against rust and corrosion
Cons
  • May not be compatible with certain engine types

Revainrating 5 out of 5

Bar’s Leak in my review

My snowblower developed a terrible rear seal leak last winter. I decided to try the Bar’s Leak Engine Repair instead of tearing down the engine and replacing the seal. I had all summer and ran the blower many times. To my surprise, absolutely no more leaking anywhere on the engine! It works as advertised.

Pros
  • Engine & Oil
Cons
  • Can leave a residue in the engine

After adding this product to our engine, the dripping oil (evidenced by the size of the spots on the ground) lessened significantly, though not entirely. Hard to quantify exactly how much of a difference it made, but I suppose every little bit helps!

Pros
  • Formulated to dissolve and remove damaging deposits
Cons
  • May not extend engine life

My car leaks oil, this stuff definitely helps with that. Granted it is not a perfect solution to the problem but it's a much cheaper solution than getting a new engine for a car that I do not plan on keeping for much longer. This also stopped smoke coming out of the exhaust. I recommend using 1 or 2 applications immediately AFTER getting an oil change.

Pros
  • Helps to keep older vehicles running smoothly and efficiently
Cons
  • Cannot repair engine electrical issues

Revainrating 5 out of 5

WORKS GREAT! best in my review

I have a 2002 Dodge Dakota w/ the V6. The check engine came on, the code said the #4 cylinder was misfiring. It has 142,000 mi. on it. so I took it to the shop. They put new spark plugs, wires and distributor cap on. that didn't work. He checked the compression it was acceptable (125 psi.) he checked the injectors and the were good. The check engine light still came on. So I did a oil change and added a bottle of Bar's leak 1000 engine repair. I've put on just over 200 miles and the light has…

Pros
  • Helps Clean Internal Parts
Cons
  • Can cause engine knocking

Revainrating 5 out of 5

Didn't expect it to work as good as it did.

I'm a bit surprised at how well this product works. I've used many other stop leak products in the past, but none have ever worked this well.I recently bought an older truck that I soon found out had a significant oil leak coming from the oil pan. The truck needed an oil change anyway, so I drained the oil, dumped this stuff in, and refilled the oil reservoir. Started the truck up again, let it idle for a few minutes, then walked away. The oil leak (which was a very significant leak) was…

Pros
  • very good
Cons
  • May not pass emissions tests after use

Revainrating 3 out of 5

who knows? best in my review

i added this at the last oil change interval. who knows if it actually works? i'm hoping its at least doing something good inside the motor.

Pros
  • Me justo mucho
Cons
  • May not improve engine performance

Revainrating 5 out of 5

Exceptional product

I ended up cancelling my order bc I found it at Walmart for half the price but the product is great, does exactly what it supposed to do. I used it with oil change for the notorious 2.4l ecotec oil burning issue. The burning has stopped or at least slowed dramatically, in addition to quieting the light ticking sounds.

Pros
  • Can help to improve the overall reliability of the engine
Cons
  • Can cause engine oil contamination

Revainrating 3 out of 5

Not my daily driver.

I got this too possibly help with, the black smoke (when I start the engine, and many, many times I had to even stomp on the gas pedal and hold it, before the engine would even turn over.Yes, I am well aware, of the possibility of being old gas.Why? This 2003 , 6.0 liter engine, has 34100 miles on it.I bought it used in 2006, at which time, we lived on a mountain ( but my work was 35 miles away, and I averaged 60-80 hours a week working).Not much time left to do things with my truck.It’s real…

Pros
  • Can be used alongside other engine treatments and additives
Cons
  • May not be recommended for use on older or vintage engines

Revainrating 4 out of 5

Worked for one out of three cars

Used this product on a Honda Accord 1999 EX 4cyl. Car was leaking oil. I had to refill a quart every 2-3 weeks. Mechanic informed me the car was leaking in numerous spots but the biggest area of concern was the rear main seal.I tried some Lucas Oil 10278 stop leak but it made zero difference after 3 weeks. Before deciding to pay my mechanic around $1200 (my car is only worth $2000!) for all the seals and gasket repairs, I used this Bar's Leaks 1000 engine repair. Poured the entire content in…

Pros
  • Easy to use and quick to take effect
Cons
  • Can affect oil pressure

Revainrating 5 out of 5

Stops the smoke quick

Worked as promised. Just dropped the whole thing in my JD Kohler engine, which would billow out white smoke when under duress. Now it runs clean all the time.

Pros
  • Can restore the engine's performance and extend its life
Cons
  • May not work for turbocharged engines

Revainrating 5 out of 5

Leaks will be leaks.

This product seemed to increase my leak for the first day. Then slowed it over the following week. The leak is now nearly back to what it started at several weeks after using. It seems like a some win and some break even product. It did seem to increase the power on acceleration and decrease engine noise when idling. Good price for the product. If you have a leak and do not want to pay huge repair costs, it's worth giving a try!

Pros
  • Check Engine disappeared after adding this to slow an oil leak on my Nissan maxima. Will buy again.
Cons
  • Can void the manufacturer’s warranty

Revainrating 4 out of 5

Sort of works best in my review

Stopped all leaking from an old worn oil gasket for a few months then the leak resumed. It might have been the temperature change from spring to summer, but it didn't last very long. At least the leak is still slower than it used to be!

Pros
  • Can help to restore the engine's smoothness and responsiveness
Cons
  • Can cause engine oil foaming

Revainrating 5 out of 5

This stuff works! best in my review

After letting my 20HP 50 inch riding mower sit unused for a season it appeared to have the piston rings stuck due to oil smoke and dripping oil coming from the muffler during and after operation. I measured the proper amount of Bar's engine repair to the mowers oil quantity and let it run. Within 15 minutes the problem went away, and now it runs like new. This stuff works!

Pros
  • Can help to stop head gasket and other engine leaks
Cons
  • Can cause engine rattle

Revainrating 4 out of 5

WORKS WELL best in my review

PRODUCYT WORKS WELL IN 2007 SUZUKI XL-7 WITH 200,000 MILES ON IT. I SEEM TO GET ABOUT 1.5MILES MORE PER GALLON AND THE CAR BURNS LESS OIL. I USE THIS WITH SYNTHETIC OIL.

Pros
  • ‎USA
Cons
  • Can cause engine smoke

Revainrating 1 out of 5

Restore, Engine Restorer works much better.

Restore brand engine restorer worked much better for my car to a this did. This made my car’s engine feel a little weird and sluggish. Restore doesn’t ever make my car feel like that, much better product than this in my opinion.

Pros
  • Can be used as a preventative measure to keep the engine in tip-top shape
Cons
  • Cannot repair engine vacuum leaks

Revainrating 4 out of 5

Great product. Works as promised.

Bar's leaks is a great product that works as claimed. Stopped the smoke from my car's engine quickly. Just add to your oil and drive about 100 miles for it to work. Very pleased.

Pros
  • ‎1000
Cons
  • Can cause engine vibrations

Revainrating 1 out of 5

trash my pcv valve broke after using this

did not work for vw tiguan check engine damege oil separator and pcv valve have to remove the oil and put new oil garbage product

Pros
  • ‎1.05 pounds
Cons
  • Cannot repair engine coolant leaks

Revainrating 4 out of 5

Engine stopped leaking for a while

Took our leak away in our 10 year old minivan. But after a year or so the leak has come back. Not a permanent solution, but does work.

Pros
  • Does not contain harmful chemicals or additives
Cons
  • May not prevent engine wear

Revainrating 5 out of 5

Wow! What a difference!

I used this on a 2004 chevy cavalier with 174k miles. It was burning oil at about 1/8 of a quart every 1000 miles. I put this in using some high quality high mileage synthetic oil, and damn! What a difference! The car runs way better, has a drastic pickup speed, and seems to get a bit better mileage.I wish they made a product for every fluid in a car! I would buy a break repair if they made it in a bottle!

Pros
  • ‎7.41 x 2.85 x 1.35 inches
Cons
  • Cannot repair valve stem seals