STP Ceramic Oil Treatment, Protective Coating and Anti-Friction Technology, 15 Oz (19387)

I gave this 5 stars for actually quieting a slightly worn lifter bore and smoothed out my idle - I know I've got a problem and there's no magic juice-in-a-can that's gonna fix it but, I give credit where credit is due.There's more than a few bad reviews for this product but, it boils down to this:If you're engine components are rattling around in your engine like a marble in a paint can, this won't do anything for you. That being said, if you're at or around the outer wear tolerances, this stuff will put a smile on your face.

I poured this product into my 2007 Toyota RAV4 with a V6 engine that has 245,000 miles on it. The engine runs strong, but I could hear the overhead valves clicking when I start the car until it warms up. After adding a bottle of this product, I was pleasantly surprised to find that the noise disappeared. The car also seems to run smoother now. Overall, I am impressed with the results so far.

It is a very good product. I'll check out the gas mileage, when going on a long drive

I have very wishful thinking. I going to try a get over 300,000 out my car that I baby. Definitely know this would not hurt.

Works well, quiets noisy lifters. Seems to also cool engine a bit. Much cheaper than the big name products and STP has a good reputation. Used this on some garage door rollers with a brush worked well. I put 1 ounce in a motorcycle engine. I was worried the clutch would slip? But, No issues and engine ran a bit cooler.

Me gusto . Y no cambia el color del aceite .

This works great in my ngine, cuts down friction and gives me better gas mileage!

You may ask, with this being a liquid, how is it dry??Well, I'm referring to the Ceramic Si02 component, which is a Dry Substance that is mixed into an oil based carrier so that it can circulate through the Engine and come into contact with vital moving parts of the Engine such as the Pistons and Rings, the Crankshaft Bearings and Connecting Rod Bearings, as well as the Camshaft(s) Lobes and Bearings and Valve Guides, to name a few.Ceramic has been scientifically (There is a Video) proven to withstand up to 1,200 Degrees Fahrenheit, and will not break down or gum up your system like other products that use other known So-Called Dry Lubricants....It does NOT kill your warranty either!!!!!As far as Fuel Consumption and Economy is concerned, I cannot say I have noticed a marked increase in Fuel Efficiency, plus my foot is made of lead, but that is another issue, lol.... It might under the right circumstances, IDK.As far as the sound and performance of my Engine, I did notice a marked decrease in noise at Idle, and much less vibration of the engine at idle, the Engine runs extremely smooth now, that I can honestly say is happening.Also, my engine seems to be quite a bit more responsive and free using the STP Ceramic too. It just feels like it was given a bit of a boost, it accelerates much better, its very smooth, and I can feel it pulling harder through the Power Band than ever before, and that can only be because the moving parts are indeed being much better lubricated, friction is sharply being reduced by the Ceramic, and the engine is just free to cycle much better during operation.Again, other products make claims, but when put to the test, they are known in laboratory tests to gum up and break down when subjected to extreme heat, and they doing NOTHING to improve Overall Lubrication of your Engine's most Vital Moving Parts, however Ceramic Si02 cannot and will not break down, it doesn't gum up your system, etc., or anything else, even under extreme operating conditions like, for instance, the Arizona heat in Summer!!I strongly believe this product does what it is intended to do most, and that is add a layer of Dry Lubricant to your engine and allow less wear and more longevity to the life of your engine, and is IMO best used with Premium Synthetic Oil and a Premium Oil Filter.This is my own observation, my opinion based on my experience, I am not trying to sell anything, I am just sharing my personal results, and all I can say IMO, this stuff really works!!