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🛠️ Seal the deal on leaks before they seal your wallet!
Bar's Leaks OS-1 is a 16.9oz universal oil seal additive designed to repair leaking main seals, gaskets, and worn valve seals in gasoline and diesel engines—including turbocharged, hybrid, and racing models. Trusted for over 75 years, it stops oil burning and blue exhaust smoke across a wide range of vehicles and equipment, offering a cost-effective, easy-to-use solution to prevent expensive engine repairs.








| ASIN | B0764H6K45 |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #9,008 in Automotive ( See Top 100 in Automotive ) #20 in Engine & Oil Fluid Additives |
| Brand | Bar's Leaks |
| Brand Name | Bar's Leaks |
| Compatible with Vehicle Type | Car, Truck |
| Container Type | Can |
| Customer Reviews | 4.2 out of 5 stars 3,887 Reviews |
| Global Trade Identification Number | 00046087010358 |
| Included Components | 16.9 oz Oil Seal |
| Item Highlight | Repairs Leaking Main Seals and Gaskets, Renews Worn Valve Seals and Guides, Stops Oil Burning & Blue Exhaust Smoke |
| Item Type Name | Oil Seal (Engine Oil Burning/Leak Repair) |
| Item Weight | 1.1 pounds |
| Liquid Volume | 16.9 fluid ounces |
| Manufacturer | Bar's Products |
| Manufacturer Part Number | OS-1 |
| Manufacturer Warranty Description | See Manufacturer |
| Model Number | OS-1 |
| Number of Packs | 1 |
| Package Information | Can |
| Size | Pack of 1 |
| UPC | 046087010358 |
| Unit Count | 16.9 Fluid Ounces |
| Vehicle Service Type | Car, Truck |
J**Y
Product is great
terrific, worked wonders
A**S
A Stop Leak That Works!
This engine seal stop leak by Bars Leaks actually works! It can't fix a cracked block or head, but if it is your gaskets that are worn and leaking this will restore the gasket and stop the leak. Follow the directions to the letter however. That is important. I do recommend this over other brand oil stop-leaks.
F**O
no work
i try no wok
S**N
Really works
Works. Had a small leak and i flushed the engine, changed the oil adding the stop leak with the new oil. Ran the engine as instructed to, no leaks and its been over a month. Was recommended to me, and it was worth it.
G**G
It ok could be better
Took a chance on it It slowed the leak a little but not a real difference
H**N
Seals leaks on O-rings
This item seal leak worked for me, it was not Magic, product went to work right away, day by day till no more leakage under neath ATF pan, dealership said it was the oil cooler (would cost to replace oil cool $950.00), I did see a glimmer of oil shine when I used my flashlight, problem was #1 oil gasket was in wrong place on plastic cap, (use 2nd lip), I believe the problem was rear main seal o ring shrieked, Bar’s seal made seal expand / grow, after about a week no more leaks. I did change the oil before I added this product with fresh oil, 5W/20 6 quarts in a 2015 Jeep Wrangler. oil cooler was good, o rings could of been the same, Engine shows no sign of leaking and it’s been 2 months now. “Hope it works for U”. Before spending your money try using this Bar’s leak stop, what do you have to lose $950! 😂
J**8
Post it where everybody can see it
0 STARS OR BELOW I bought this oil seal product and IT DOESN'T WORK, and it didn't stopped or even slowed the leak and then I call the company and he told m flately that it doesn't have any kind of warranty, and in order to get my money back I would have to take it to the dealership or a certified mechanic,to have it verified and certified, nobody is going to spend more money and time to get a refund for less of what you are spending, SO DONT BUY THIS TRASHY PRODUCT
H**4
WORK GREAT
WORKS EXCELLENT FIXED MY PROBLEM ! THANK YOU
A**H
Fast Shipping and great product
I've bought a lot of products before but they didnt totally stop the leakage as what this product did.
J**G
Funciona!!!
Magnífico. Tengo una de mis motos con casi ya 40 años y algunas fugas de aceite motor severas. No era una gotita, era ya casi pequeños charcos. Decidí probar este mejunje y el resultado es de 10. Han desaparecido por completo. No hay fugas ni gotas ni nada de aceite ya bajo la moto. Cuesta creer en estos productos milagrosos, de hecho no creía en ninguno pero como tenía mucha pereza y poca pasta para levantar el motot y gastar más de 200€ en juntas decidí probar por las reseñas positivas que leí a ver que tal en mi moto y si! Funciona 🙂 Apto para motores con embrague en baño de aceite o sea que lo puedes poner en tu moto sin problema... 😜
R**R
This seals valve stems!
This actually works! I put it in my John Deere tractor and it completely got rid of the blue smoke on a cold startup!
A**I
Works
Works
J**.
Calidad
Resultados muy buenos, lo recomiendo
Trustpilot
3 days ago
1 month ago