Search  for anything...
Bar's Leaks

Bar's Leaks OS-1 Seal Engine Oil Burning/Leak Repair - 16.9 oz.

    • Based on 3,359 reviews
Condition: New
Checking for product changes
$17.99 Why this price?
Save $4.00 was $21.99

Buy Now, Pay Later

As low as $4 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: 12 left in stock
Fulfilled by Amazon
Arrives Saturday, Apr 19
Order within 7 hours and 48 minutes
Available payment plans shown during checkout

Recently Viewed

Size: Pack of 1


Style: Repair


Features

  • REPAIRS LEAKING MAIN SEALS AND GASKETS: We have designed this product to work in all gasoline and diesel engines including turbocharged, EcoBoost, hybrid and even racing engines.
  • RENEWS WORN VALVE SEALS AND GUIDES: Your vehicle is a good candidate for Bars Leaks Oil Seal Engine Oil Burning & Leak Repair if it does not consume more than one quart of oil per day.
  • STOPS OIL BURNING & BLUE EXHAUST SMOKE: This covers 3, 4, 5, 6, 8 and 10 cylinder engines in all cars, trucks, vans and SUVs. Our product can also be used in heavy-duty applications referencing the appropriate dosage level.
  • SEAL ALL OTHER OIL LEAKS, DRIPS AND CONSUMPTION: This applies to a wide range of other motor applications too - tractors, boats, RVs, motorcycles (including wet clutch), ATVs, lawn equipment.
  • MADE IN THE USA

Description

Your vehicle is a good candidate for Bar’s Leaks Oil Seal Engine Oil Burning & Leak Repair if it does not consume more than one quart of oil per day. We have designed this product to work in all gasoline and diesel engines including turbocharged, EcoBoost, hybrid and even racing engines. . This covers 3, 4, 5, 6, 8 and 10 cylinder engines in all cars, trucks, vans and SUV’s. Our product can also be used in heavy-duty applications referencing the appropriate dosage level. This applies to a wide range of other motor applications too: tractors, boats, RV’s, motorcycles (including wet clutch), ATV’s, lawn equipment.

Brand: Bar's Leaks


Vehicle Service Type: Car, Truck


UPC:


Automotive Fit Type: Universal Fit


Global Trade Identification Number: 58


Brand: ‎Bar's Leaks


Vehicle Service Type: ‎Car, Truck


UPC: ‎046087010358


Automotive Fit Type: ‎Universal Fit


Global Trade Identification Number: ‎58


Manufacturer: ‎Bar's Products


Model: ‎Oil Seal


Item Weight: ‎1.1 pounds


Package Dimensions: ‎8 x 4 x 2 inches


Country of Origin: ‎USA


Item model number: ‎OS-1


Manufacturer Part Number: ‎OS-1


Date First Available: October 3, 2017


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Apr 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Worked great at slowing oil burning / leak
Size: Pack of 1 Style: Repair
Impressed with how well this product help reduce the amount the of oil consumption and oil leaks in our 2008 6cyl , 175K mile car. While the car still has a leak somewhere as I can smell it hit the exhaust pipe at times, it is not leaving alot on the ground like it was before. I will likely keep using this product after each oil change until we eventually just get rid of the car. ... show more
Reviewed in the United States on December 22, 2024 by Rob
    • Works goods for small leaks or damaged seals
Size: Pack of 4 Style: Repair
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.
Reviewed in the United States on January 26, 2025 by ChicagoVegasJack
    • Had multiple leaks, heavy oil loss
Size: Pack of 1 Style: Repair
As my car get near 15 years old and still a daily driver had started to experience many leaks. The BMW community says not to use the product in your BMW. I have a BMW 323i and with the age and mileage was looking at putting a couple thousand into repairs so gave this a shot. Multiple leaks were resolved while one weeper persists. Have ran for over a month with minimal oil loss and improved performance. I did end up flushing out the system after running it with this product in it for the month. ... show more
Reviewed in the United States on January 10, 2025 by K
    • Actually works for burning oil
Size: Pack of 1 Style: Repair
Actually works. Had a car that burned oil bad due to a poor engine design! This kept the oil contained. However I found this needed to be constantly applied to work. Not just one and done in my situation.
Reviewed in the United States on February 21, 2025 by andrew riegler
    • Read the fine print
Size: Pack of 1 Style: Repair
I tried this on a 2004 Tahoe Z71 with 120k miles that had a rear main engine seal leak. It did not work and I thought I would utilize the full refund guarantee until I read the requirements of having a repair shop use it and verify that it did not work. Where are you going to find a shop that will waste their time to use this item? You’d have to make one up, so use it as a “Hail Mary” to see if it’ll work but don’t deceive yourself into thinking that you can get your money back if it doesn’t work. P.S. I work part-time at a repair shop and I won’t compromise my values to get back $15+ because of a gimmick warranty offer. ... show more
Reviewed in the United States on March 15, 2023 by Thomas Sherman
    • Stops small leaks.
Size: Pack of 1 Style: Repair
I use it every 6 months with 12,000 mile synthetic oil and keeps seals lubricanted, and leak free.
Reviewed in the United States on February 16, 2025 by Zorro
    • Snake Oil
Size: Pack of 1 Style: Repair
Doesn’t change a thing. My vehicle blows a little white smoke only while idling so I suspect it isn’t major. This did absolutely ZERO to change it. As in Pharmaceuticals, they call this the “Placebo effect” Don’t waste your money.
Reviewed in the United States on February 5, 2025 by Dean Graves
    • Perfect for my 1999 and 2000 vehicles
Size: Pack of 1 Style: Repair
It was easy to use and performs as advertised. You have to use a new bottle at each oil change. I saw this on a Scotty Kilmer video and used it to stop fluid leaks.
Reviewed in the United States on February 11, 2025 by Beachy Keen

Can't find a product?

Find it on Amazon first, then paste the link below.