STP® Synthetic Oil Treatment

STP Synthetic Oil Treatment. Extra protection for longer drain intervals.

[chriscosby]

I have been using STP at every oil change on all my vehicles after they reach around 75, 000 miles for over 40 years. I get at least 250, 000 on all my engines. Currently I have a Toyota Tacoma with 213, 000 miles and a Ford Fusion with 127, 000 miles.I use Mobil One synthetic oil, and regularly change the oil and filter every 5 to 6 thousand miles. Both vehicles are running like new. I have used STP on GMC, Ford, Toyota, and Volvo with great results.

[damonmccoury]

I'm a big fan of STP products. I've used their products on my own vehicles and for my wife's work trucks, which get used hard and meet just about every criteria for severe use. So I can definitely say I've put their products to the test.
STP products are generally quite affordable and actually work. I've used almost all of their fuel treatments and their oil treatments and even their motor oils; and I have found that STP products are made with quality and help provide extra protection when performing preventive maintenance services on our vehicle's.

[cnfrisch]

Just added some in my 2020 RAM 5.7 Hemi. Will see what happens but so far, so good. The engine seems to be quieter and smoother!

[jeremydavis]

I use this every oil change. You can feel it makes the oil slicker. Love it! I also use the standard in my small engines. Great products

[tipoomaster]

What are the key components that accomplish these goals, where are the studies saying it works?

[superglx]

Is this okay to use in diesel engines there is nothing on the bottle that says gasoline engines only.

[Kmssvx]

Can I add this treatment 2000miles after oil change? My oil still good. I’ll do change in few thousand

[Doomsday-yi]

This one is for diesel or petrol engines?

[Condor]

How much ZDDP does it increase a standard 800-900ppm synthetic oil, like Mobil 1 5w20?

[MrJoedotmac]

Anyone ever had an oil analysis by Blackstone when using this product? Would be interesting if there was a before and after scientific analysis available.

[AngriestAmerican]

It definitely makes the oil viscosity last longer!! My concern is with cold starts. Now that I have 78k on my motor, I was wondering if this product adheres to the bearings and crank shaft, so there is still some lubrication on cold starts? Is there another product you can direct me too that might do the same task? I used to use the Blue bottle STP for my 2000, but that seems way to thick for newer engines.

[tipoomaster]

Scientifically formulated, so show us some scientific studies showing a benefit