STP High Mileage Oil Treatment + Stop Leak Engine Oil Additive, 15 fl oz
STP High Mileage Oil Treatment + Stop Leak Engine Oil Additive, 15 fl oz
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STP High Mileage Oil Treatment + Stop Leak Engine Oil Additive, 15 fl oz

4.6 stars out of 371 reviews
(4.6)|
371 ratings
STP High Mileage Oil Treatment + Stop Leak Engine Oil Additive, 15 fl ozSTP High Mileage Oil Treatment Stop Leak 15 fl oz2 pack STP High Mileage Oil Treatment Stop Leak Engine Oil Additive 15 fl oz12 pack STP High Mileage Oil Treatment Stop Leak 15 fl oz24 pack STP High Mileage Oil Treatment Stop Leak 15 fl oz6 pack STP High Mileage Oil Treatment Stop Leak 15 fl oz3 pack STP High Mileage Oil Treatment Stop Leak 15 fl oz
Pack Size:Single

Key item features

  • Mileage Specific: Formulated for vehicles with over 75,000 miles, this 15 fl oz engine oil additive is designed for high-mileage protection.
  • Wear Protection: Contains ZDDP oil additive, an anti-wear agent that helps prevent wear and protects the engine in high-mileage vehicles.
  • Friction Reduction: Its high-viscosity formula creates a thick cushion between moving engine parts, effectively reducing friction.
  • Leak Prevention: Acts as an engine stop leak, helping to rejuvenate seals and gaskets to prevent engine leaks, reduce noise, and stop smoking.
  • Regular Maintenance: Recommended for addition to engine oil during every oil change as part of routine car maintenance.
  • Broad Compatibility: Suitable for use in a variety of vehicles, including all cars, light trucks, and SUVs.
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Current price is $6.7945.3 ¢/fl oz
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Customer ratings & reviews

4.6 out of 5 stars
stars371 ratings101 reviews
How item rating is calculated
  1. 5 stars81% (300)
  2. 4 stars11% (39)
  3. 3 stars4% (13)
  4. 2 stars1% (5)
  5. 1 star4% (14)

Reviews summary

Pros
  • : Provides improved performance and smoothness.
  • : Offers good value at this cost.
  • : Helps stop or reduce oil burning in high mileage cars.
  • : Helps prevent oil spills and prolongs engine oil lifespan.
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Showing 1-3 of 101 reviews

Sep 19, 2025
Treasure
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

High Mileage Smoke...Buy This

My Dodge Durango 2005 had a small oil leak and significant underhood smoking (even on cold start-up). I was mid oil change and questioned if the timing was right to utilize this treatment because many reviews advised use after fresh oil. I needed to use my vehicle more this week and decided to add the treatment to the oil. I drove the highway 30 minutes and by the time I'd returned home no more smoking. I am extremely satisfied with the results. I'll add another bottle in 3 months after my next oil change.

Helpful?6MYQ21CCDSO019897926
Aug 31, 2025
Brian
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

being an STP product I would expect a good quality lubricant. I was not disappointed as this product is very thick and it seems that it will do a good job. I have a 2004 Kia Spectra with 125,000 mi so I wanted to add a little extra protection to the crankcase. My car seems to use about a quart of oil every 5,000 mi so I thought I would try this in case I have a small leak somewhere as it is supposed to be helpful in stopping leaks. I would definitely recommend this for any engine, especially those with a lot of miles.

Helpful?6MYQ21CCDSO019897926
Dec 6, 2025
ariyanna
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Great product

I just bought this product because I was trying to use it until I got my car fixed. I don't know if it really worked or not but a lot of people say it was a good product so I bought it but I actually got my car fixed so it did come in handy thanks again

Helpful?6MYQ21CCDSO019897926