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30% Off Online Orders of Select Parts and Accessories. Enter Promo Code PEP30 in Cart

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30% Off Online Orders of Select Parts and Accessories
Receive 30% Off Your Online Purchase. Use promotional code PEP30 at checkout to receive discount. Not valid in combination with any other discounts or promotions. Not valid on gift cards, special orders, installed merchandise, commercial or fleet purchases. Excludes the following categories: Tires, Wheels, Batteries, Powerstop Brake Kits, Oil, Antifreeze, Refrigerant, Truck Boxes, Vent Visors, Bug Shields and BRANDS: Razor, Traxxas, Superchips, Hypertech, Edge, Bully Dog, Diablo, Edelbrock, Holley, NOS, Proform, Specialty Auto, Thule, Autometer, Accel, K&N, Kenwood, Pioneer, Sony, JVC, MSD and BBK Performance. Valid online until 2:59 am EST on 10/27/16. Online orders scheduled for in-store pick up must be completed by closing on 10/26/16 for discount to apply.

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  • Part #: 20401 |
  • SKU: 8994307

Available tomorrow

Pay in Store Available

    • Stops and prevents engine oil leaks
    • Recommended for rear main seal repair
PayPal available for online purchases. Major credit cards accepted online and in store. Pay online, in-store or take advantage of our Pep Boys credit card. Learn more and see additional details in cart.

NO LEAK 16oz NO LEAK Engine Oil Treatment

NO LEAK Engine Oil Treatmentis safe and compatible with ALL engine oils. NO LEAK is made to stop and prevent engine oil leaks.
  • Stops and prevents engine oil leaks
  • Recommended for rear main seal repair
  • Stops smoke and repairs rear main seals
  • Safe and compatible with ALL engine oils


Rated 3.9 out of 5 by 8 reviewers.
Rated 5 out of 5 by The product works and saves my car. I receeived a free No Leak Engine Oil Stop Leak and I would like to tell you that this stop leak works. October 12, 2016
Rated 3 out of 5 by ok ok but it s not working September 29, 2016
Rated 4 out of 5 by product works for my application installed now for about three weeks noticed small leak to be gone August 25, 2016
Rated 4 out of 5 by Made it better Used noleak about a month ago on a leak that I had was leaving a small puddle on the driveway. I still have a small leak but the puddle did get smaller so it worked a little. Not sure if adding another will finish the job or maybe just take it in to get looked at June 19, 2016
Rated 5 out of 5 by Tried it on my truck Have had a small persistent leak in my Ford F-150 and added no leak I bought from an auto parts store. It's been about a week and i don't see the leak any more! June 19, 2016
Rated 1 out of 5 by Still leaking Doesn't do anything. June 26, 2015
Rated 5 out of 5 by This product is excellent I couldn't believe that my engine oil leaks could be reduced in the manner that they were. However, for one week, my engine did not leak. My engine had big leaks (about five of them), and now, the engine still leaks, however very little. I maybe should try another bottle? Great product. September 20, 2014
Rated 4 out of 5 by ok The product was ok August 10, 2014
  • 2016-10-26 T08:35:08.192-05:00
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