My car has 185000 miles it's been very well taken care of. I added prolube and the engine got noticable quiet. So far so good getting ready to do oil change and add more then I will make my final decision if to purchase more. But awesome so far

This works EXACTLY as described, and shown in numerous videos. Eliminated the lifter tick in both of my Land Rover LR4 V8s (which many mistake for timing chain issues), and has caused my Toyota FJ Cruiser to become so quiet, I can’t even tell when she’s running! Will be adding to differentials, next.

I’ve bought 3 containers so far, and will likely grab a gallon!

My 2017 Chevy Silverado was running a little rough. At stop signs and red lights the truck would shake a little. Also with it just running had bit of a tapping sound. Added 6oz to the motor oil, drove about a mile and it all seemed to stop. It really works great. Highly recommend. Will definitely purchase again.

I placed 3 ounces in my oil tank and took the bike out for an hour long ride . The sounds emanating from the engine became much reduced . The running oil temperature dropped from on average of 210 F to 193 F . I’ll buy again . Just wish you had a Canadian outlet to make things more economical .