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Bar's Leaks OS-1 is a premium synthetic blend oil seal repair solution designed to fix leaking main seals, gaskets, and worn valve seals in gasoline and diesel engines. Compatible with all engine oils and suitable for a wide range of vehicles including turbocharged, hybrid, and heavy-duty engines, it stops oil burning and blue exhaust smoke while renewing engine performance. Made in the USA and highly rated by thousands of users, it’s the go-to fix for oil leaks and consumption.








| ASIN | B0764H6K45 |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #1,707 in Automotive ( See Top 100 in Automotive ) #4 in Motorcycle Chemicals & Fluids #33 in Automotive Oils |
| Brand Name | Bar's Leaks |
| Compatible with Vehicle Type | Motorcycle |
| Container Type | Can |
| Customer Reviews | 4.2 4.2 out of 5 stars (3,663) |
| Global Trade Identification Number | 00046087010358 |
| Included Components | 16.9 oz oil seal |
| Item Type Name | Oil Seal (Engine Oil Burning/Leak Repair) |
| Item Weight | 499 g |
| Liquid Volume | 16.9 Fluid Ounces |
| Manufacturer | Bar's Products |
| Manufacturer Part Number | OS-1 |
| Manufacturer Warranty Description | See Manufacturer |
| Model Number | OS-1 |
| SAE J300 Viscosity Grade | 15W-40 |
| Size | Pack of 1 |
| UPC | 046087010358 |
| Unit Count | 16.9 Milliliters |
| Viscosity | 15W 40 |
A**I
Works
Works
E**L
Work
Perfect product
T**N
it really worked on my 2007 bmw 740 in dubai
my car smoked a lot on high throttle and when the traffic was busy or parked for 5 to 10 minutes, the exhaust always smoked and smelled I spent a lot of money on some additives, and got advice from the garage for the repair very high repair cost to replace valve seals, I also ordered many kinds of pcv valve to replace but no success i have tried this product and it worked, it's not 100% but it's also 70%, my car has reduced smoke, and has reduced odor, i think it will work by adding it every time oil
A**I
انصح استخدام هذا المنتج ممتاز
A**.
لا استطيع التقييم لأن العطل عندي كان أكبر من ان بحل بهكذا مواد وضعته في ماكينة السيارة ولا اعرف ان كان جيد او لا لأني ذهبت إلى اصلاح تسرب الزيت نظرا لكثرته فلم يظهر لي جودة المنتج من عدمه
R**L
Not as claimed
I purchased it based on what was printed on the product where it seems like it perfectly suited my vehicle because it was burning just a bit of oil over a period of time. Had no change in oil consumption&exhaust smoke. I just went ahead and rebuilt my engine instead.
S**H
VERY GOOD
VERY GOOD
W**N
Still burning oil; Still had to put .5L of synthetic oil after 2 weeks.
At first, it gave a more sensitive acceleration response but apparently still burns oil.
A**H
I've bought a lot of products before but they didnt totally stop the leakage as what this product did.
F**.
After not driving the truck for two week, I noticed some little blue smoke came out of my 2006 tacoma when I started it. Searched web and this product was mentioned. I put one bottle into the engine when doing the oil change and never saw the blue smoke again. Can't be easier than that and it does what it says to do.
A**C
Great product. Those what it says on the bottle
J**G
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... 😜
J**.
Resultados muy buenos, lo recomiendo
Trustpilot
Hace 1 mes
Hace 1 mes