OS-1 Oil Seal Engine Oil Burning/Leak Repair, 16.9oz, 1-Pack | Repairs Leaking Main Seals and Gaskets, Renews Worn Valve Seals and Guides, Stops Oil Burning & Blue Exhaust Smoke

terrific, worked wonders

The product worked on a 2012 Bmw 750Li that was smoking when at a light, in traffic, or in line at fast food..... Was fine when diving as long as not at a stand still for over 3 to 5 Mins or stop and go traffic..... I fell like it was the valve seals leaking ao I brought this in hopes it would work.... The initial one I was going to try seems to stay sold out..... I decided to purchase before a trip that was 200 miles away to give it a chance to work..... I put it in the night before for 15 to 20 mins 1st and as always it started smoking...... On the trip back 2 days later before making it home we stopped at Zaxby's and about 6 cars were in line.... I say oh boy because it always smokes after a few mins in line soni have to cut the engine off and turn back on after a car move up..... But this time for the 1st time it did not smoke.... I was amazed and kept looking for the smoke but never came..... So the product works.... Dont know if it already worked on the first 200 mile because i did not test until i retured so I drove over 400 miles before i test it.... But no smoke at all...... Probably will cost over 5k to change all the valve seals if not more.

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.

Used this product in a 2012 Civic that was burning a quart almost every 500 miles. This almost put a complete stop to that. I had to combine it with another product in order to stop the oil burning almost completely, but this did decrease the amount of oil burning by at least 40%.Keep in mind this will not fix a broken engine. My civic has a defect from the factory that causes oil blow by - the only true fix is to get new piston rings installed. This wont fix anything - but it will help with oil burning.

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.

It's excellent—I highly recommend it. It stopped the oil leak in my steering system.

0 STARS OR BELOWI 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

WORKS EXCELLENT FIXED MY PROBLEM ! THANK YOU

I've bought a lot of products before but they didnt totally stop the leakage as what this product did.

I put the SO-1 into my engine and turned on the engine sat there for 20mins then drove for 20miles got home and checked my dip stick still where it was when I started my drive, now a few days before I had changed my oil, the next day I replaced my front brake pads I noticed my lower wishbone was very shiny it was soaked in oil, now it isn't, so SO-1 must have worked caramba! Happy me, and no I did not think it would work and now think £22.00 was money well spent, well done Bars Leaks!

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... 😜

This actually works! I put it in my John Deere tractor and it completely got rid of the blue smoke on a cold startup!

Works