Oil Seal Engine Oil Burning & Leak Repair
Oil Seal Engine Oil Burning & Leak Repair
As a car ages, engine seals harden and shrink from the plasticizers being depleted over time. This means leaks, and you don’t have time for that. Bar’s Leaks Oil Seal™ is a professional strength synthetic stop leak that is proven to revitalize these worn seals and gaskets to restore them to like-new performance. This is our strongest formula ever to stop main seal, valve seals, timing cover seal, cam seals, crankshaft seal, oil pan, valve cover and all other oil leaks. If you have an oil leak, this fixes it with a single bottle.
- Professional-grade Oil Leak Repair
- Repairs Leaking Main Seals and Gaskets
- Renews Worn Valve Seals and Guides
- Stops Oil Burning & Blue Exhaust Smoke
revitalizes worn seals and gaskets
Product Details
Product Number: OS-1
Dosage: One bottle treats oil capacity from 4.5 to 7 quarts
Size: 16.9 FL OZ
This product is incredibly effective against oil leaks, but what about oil burning? We have that covered too. There could be two possible reasons as to why your vehicle is burning engine oil. It may have an oil leak or you it could be burning oil during the ignition cycle. One common problem is if the cylinder walls are allowing oil to leak up from the bottom of the engine, past the piston and into the combustion chamber. So when the fuel ignites the oil does as well, and then expels it out as exhaust. Before you know it, you’re dealing with an oil burning problem.
The good news is that with a single application of Bar’s Leaks Oil Seal™, those problems will be history.
Your vehicle is a good candidate for this solution 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 SUVs. 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.
You have a life. Your life needs a car. Don’t let oil leaks or burning get in your way.
DIRECTIONS
- Turn engine off.
- Shake well. Remove oil fill cap and pour Oil Seal™ Engine Oil Burning & Leak Repair into engine per dosage chart.
- Do not overfill.
- Reinstall cap.
- Drive/idle engine for at least 15 minutes to mix thoroughly with oil and activate product to start working.
- Top off engine oil (add oil as needed) and leave Bar’s Leaks Oil Seal Engine Oil Burning & Leak Repair in system for continued protection. Drive vehicle as normal. Most oil leak issues are corrected in 250 miles or 3 days of driving.
Frequently Asked Questions
Technical Info
Current Deals

OS1 $5.00 Rebate
Receive a $5.00 rebate with the purchase of Oil Seal Engine Oil Burning Leak repair. Offer ends December 31st, 2025.
Click here to submit your receiptWhere to Purchase
Customer Reviews
Frank B.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

It's my go-to product
Absolutely the product I depend on. 350k miles and running strong!
Jose
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Great product
2011 Buick Enclave has been acting up and very valve noisy regardless of gas octane. I did an oil change with your Oil Seal and when I started you can hear the tic tic tic noise and in less than minute it was gone!
Gary
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Barslesks Oil Seal Additive
Added to my 1999 Hyundai 2.4L engine during oil change. So far so good. Oil smoke from exhaust stopped after about 75 miles of driving. Strongly recommend this product.
Jackie W.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Thanks to Bar's Leaks
I purchased Oil Seal and was best thing I could have done. I was burning oil like crazy and was leaking somewhere, I just couldn’t find it. After using Oil Seal, it stopped. I haven’t had any more issues. I was having to add one or two quarts of oil every week. Thanks to Bar’s Leaks it’s been fine since.
Carlo Q.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Item works effectively
Have a 2001 BMW E38 740il with the MU42TUB44 engine – 142,468 miles at last oil change 2 days ago. I put this in to primarily protect and restore the valves and seals – quiets everything down immediately and noticeably – Vanos timing chain guide failure my biggest worry – understand the perceived inevitability of it – but timing chain rattle nonexistent on start up right through to any tapping or ticking noises reduced from subdued to very quiet.
No engine issues other than very, very minor oil leakage, have original Vanos guides and timing chains, drive conservatively – works beautifully with Castrol Synthetic A3-B4 5W-30 Euro Formula Oil. Bar’s Leaks Oil Seal is a compatible synthetic-based formula. No commercial message intended – just a pass along to fellow BMW MU42TUB44 engine owners with minor small issues for preventative maintenance. Really happy with the product.
Andrew V.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Worked well
I was losing oil from the engine. I had heard about this product and thought to try it, and it worked well.
Dan L.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Use with every other oil change
Oil Seal OS-1 is the product I used.
The engine is an old Chevy 350, 182,400 miles. It’s going to be leaking oil and it did. After 2 applications your oil seal sure did the trick. I think of it as part of this old truck’s maintenance schedule. I’ll be adding a bottle every other oil change. It works!
Frank B.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Fixed leaking valve seals
Oil Seal OS-1 fixed my valve seals on my 4.0L OHV Ranger for 3 months until I had the warner weather to repair properly with hard parts.
Amit C.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Very happy, saved me from expensive repair
I used Bar’s Leak – Oil Seal Engine Oil Burning & Leak Repair (OS-1).
I have 2002 Toyota Corolla LE and it was leaking oil from engine too much. Due to that, I had to constantly add engine oil. Also, I was getting a burning smell. After using Bar’s Leak – Oil Seal Engine Oil Burning & Leak Repair (OS-1), the leak has completely stopped. I don’t get any burning smell and I don’t have to add oil anymore. I was very happy as it saved me from expensive repair.
Brandon B.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Amazing product, great customer service
My wife’s 2005 Camry was losing oil somewhere. There are tons of other products on the market but my research returned me to Bar’s Leaks. The main cause of concern was for the VVT engine in the Camry and, from my research, the (OS-1) Oil Seal was designed with this in mind. I’m not going to lie. At first, I was very skeptical but after the first couple of days I was very impressed! I was even more impressed a couple weeks later when it was still keeping all of its oil and I noticed that the wet oil stains around valve cover was dry! This product is amazing and the company offers great customer service along with a great warranty! Thank you!
Peter B.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Recommended by my mechanic
I used Bar’s Leaks OS-1 on the recommendation of my mechanic, who told me that my 2005 pickup truck had a gradual and slow loss of engine oil being caused by what he described as more of ‘slow seepage’ than a true leak. After one application of OS-1 (added a quart during a routine oil change), I no longer detected the smell of burning oil coming from the hood every time I drove. I now have the peace of mind of knowing that my oil pan life has been extended as I continue to avoid a costly repair and close in on 200k miles!
Mohammad G.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Helped my Camry big time
I used your Bar’s Leaks Oil Seal Engine Oil Burning and Leak Repair (OS-1).
My car’s piston rings got loosened and performance improved and no burning of oil on my Camry. Wow good product. Recommend to family and friends to buy.
Jose V.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Bought me a lot more time
I have used in the past Oil Seal Engine Oil Burning & Leak Repair (OS-1) on a Toyota Previa 1999 with 256,000 miles which had a lot of leaks. Well, the product gave me a lot more time before a complete repair. Thanks.
Chris &.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Exceptional products & service
Older Automobiles sometimes need a boost in the seals. Well we have several older cars. And this product is a true specialty when it comes to helping the oil rejuvenate the polymers in the seals to ensure the full life of the seals are used before the physical repair must be made!
Now the best part: The warranty is very real and prompt attention with documentation is certainly honored. So each time we invest in the product if we ever need to ask for a replacement, the replacement comes from Bar’s!
This has occurred only one time and we are more than pleased with the ever-improving line and Bar’s Leaks supplying our retailers making it simple and easy each time we need a solution.
Exceptional Products and Service!
Charles C.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

A made in USA product that works
I used your Bar’s Leaks Oil Seal product.
My 2012 Mini Cooper Countryman was burning a lot of oil. After using Bar’s Oil Seal I could see a big difference in the amount of oil I had to add between oil changes. It really works!
Chris G.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Oil Seal works
My Mini Cooper had an issue with burning oil. My valve stem seals were the problem. I added Oil Seal and it reduced the amount of oil I was burning. Also my exhaust was far less smoky. Product works!
Steve M.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Works for oil leaks!
Used Bar’s Leaks Oil Seal Engine Oil Burning and Leak Repair on a 94 Ford Ranger with 4.0L. Old engine with high mileage 200k+ using/burning 1qt of oil every 1500 miles. With the high cost of oil thought I would try this. Have went 3400 miles and 1 oil change since adding the Leak Repair and so far, I haven’t needed to top off the engine oil. At this point I’m very pleased with this product and will continue to use it and have recommended it to a couple of my friends that run high mileage cars.
Thanks for a great product!
Paul R.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

contest
Really does the job.
Frank b.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Oil seal leak
Had valve seals leaking on my 4.0l OHV Ford Ranger found this product from Bar’s Leaks and it truly worked. Added it with a new oil change and no more burning oil, lasted for 3 months for warmer weather for me to repair them with new seals.
Raul
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Just a miracle
I have a PT Cruiser that was blowing smoke when I started it, it was terrible. I needed to try something so I bought your product and in approximately 250 miles of use, the engine was fixed.
ron m.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

did what I was hoping it would
Have a Jeep 4.7 that smoked at idle and had oil consumption issues (about a quart every 500 miles). Smoked a bit at idle but giving it gas it puffed out a very noticeable cloud of smoke to where it failed it’s emissions test. I am pretty sure it is a valve guide seal issue. I decided to try Bar’s Leaks OS-1 and it WORKED.
Rod P.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Good Product
Been using for quite awhile. Great product for older (2006) engines with 99k miles.
MC
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

OS-1
Our mower developed a leak at the cylinder head. Put Oil Seal OS-1 in at the next oil change, and after a few mows the oil leak was gone. Does exactly what it says it does. Great product.
Curtis R.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

I score a big 10 for this product!
HELLO I JUST WANT TO SAY THANK YOU JOB WELL DONE YOUR PRODUCT DID WHAT IT SAYS FOR MY WORK CAR. I PUT THIS PRODUCT IN MY ENGINE ON 1-27-2022 for light blue smoke. THAT HAPPEN WHEN CAR SITS OVERNIGHT AND WHEN IT STARTS UP NEXT MORNING IS LIGHT BLUE SMOKE AGAIN BUT STOPS IN FEW SECONDS.
I DROVE MY CAR FOR FEW DAY ON AND OFF OUT TOWN 3O MILES AND BACK SO YOUR PRODUCT WOULD GO DEEPER INTO ENGINE TO MIX WITH OIL WHILE ENGINE GET MUCH HOTTER. THEN SHORT DRIVE IN TOWN AND BACK HOME. ON 2-11-2022 START CAR UP AFTER SITTING OVERNIGHT. I DID NOT SEE ANY MORE BLUE SMOKE. SO THANK YOU BAR’S LEAKS I AM NOW A TRUSTED FAN OF YOUR PRODUCTS MY SCORE IS BIG 10 FOR THIS PRODUCT!
Tremaine
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Works Great
I put this product in my 08 Nissan Altima because I had dark smoke coming out my exhaust. Now it doesn’t do it any more solve my problem I recommend
Gary F.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Review
Excellent Product works as it says on the box works even quicker than it says wholly recommended it
Albert C.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

My old Suburban had an oil leak that wouldn’t go away for months. Finally got sick of it and went to Autozone and asked if they had anything that would help. Did NOT want to spend any money on a full fix if possible because the truck has over 160K miles on it. Autozone guy recommend Bar’s Leaks and it worked within 30 minutes of me installing it. It’s been 6K miles and still no problems. I can’t recommend this product highly enough!!
Kent K.
Product Reviewed: Oil Seal™ Engine Oil Burning & Leak Repair (OS-1)

Ever since I heard of Bar’s Leaks Oil Seal, I have added a bottle when I change oil. WOW. I do not see any spots on the floor! It works great! I have finally found something that does what it says it will do. I am not anxious to pull everything to replace the seal since I have a 4WD vehicle. I love this product and wanted to tell you how great it works. I am telling everyone about it! Thanks.
