STP High Viscosity Oil Treatment 15 Fluid Ounces for Conventional or Synthetic Oils
STP High Viscosity Oil Treatment 15 Fluid Ounces for Conventional or Synthetic Oils
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STP High Viscosity Oil Treatment 15 Fluid Ounces for Conventional or Synthetic Oils

STP High Viscosity Oil Treatment 15 Fluid Ounces for Conventional or Synthetic OilsSTP High Viscosity Oil Treatment 15 fluid ounces12 pack STP High Viscosity Oil Treatment 15 fluid ounces2 pack STP High Viscosity Oil Treatment 15 fluid ounces6 pack STP High Viscosity Oil Treatment 15 fluid ounces24 pack STP High Viscosity Oil Treatment 15 fluid ounces
Pack Size:Single

Key item features

  • Friction Protection: Contains ZDDP (Zinc Dialkyl Dithiophosphate), an anti-wear agent, to combat metal-to-metal friction and help reduce engine wear.
  • Oil Consumption: Formulated to help decrease oil consumption in engines, contributing to more efficient operation.
  • Engine Lubrication: Provides a thicker cushion between moving engine parts, enhancing lubrication and protection.
  • Oil Compatibility: Scientifically engineered for use with both conventional and synthetic engine oils.
  • Versatile Application: High viscosity formula is compatible with a wide range of vehicles, including cars, light trucks, and SUVs.
  • Routine Maintenance: Designed to be added to engine oil during every oil change as part of regular car maintenance.
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Current price is $4.9833.2 ¢/fl oz
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Customer ratings & reviews

4.8 out of 5 stars
stars315 ratings96 reviews
How item rating is calculated
  1. 5 stars89% (279)
  2. 4 stars8% (26)
  3. 3 stars1% (2)
  4. 2 stars1% (2)
  5. 1 star2% (6)

Reviews summary

Pros

  • : Offers affordable options compared to others.
  • : Provides better lubrication and smoother operation.
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Showing 1-3 of 96 reviews

May 12, 2020
MasterofReality
5 out of 5 stars review

Verified Purchase

Great

My dad was a life long mechanic from 50s to 2000s. He laughed at most snake oils, STP was an exception. He said it worked. That means more than you'll ever know. It's more than just an oil thickener as most people call it. Sure, a 15oz can would thicken up 5qts of cheap 10w-30 to 12.2w-35.6, lol. Yeah that helps at times. But It really does add extra film lubrication. A must have for engine assembly. (also great for fishing reels and ratchets. Caution, a literal bead is all you need).

Helpful?32X8A66Z7MQY16817398
Jul 11, 2016
TD192
5 out of 5 stars review

Verified Purchase

Best Forever

I have been using STP Oil Treatment for over forty years. I have used it in older cars and new cars and I truly believe it has helped prevent wear on the internal parts of the engines. I have a 2001 Ford Explorer Sport that has 240,000 miles on it and it is still going strong. I believe that the STP has contributed greatly to this engines endurance. I can highly recommend this product.

Helpful?32X8A66Z7MQY16817398
Jan 7, 2026
WalmartCustomer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

I've used it for many years on my ********* mile 4.0L straight six cylinder Jeep engine that I rebuilt myself. It helps it run smooth and quiet for miles.

Incentivized Review
Helpful?32X8A66Z7MQY16817398