BestLine Racing Diamond Nano-Lubricant Engine Oil Additive For Gas & Diesel Engines.- Made in the USA. Reduce Friction by 60% - High Performance, Engine Protection, and Extend Oil Life

True story:When I first began using Best Line, about 20 years ago, being skeptical, I saved 1/4 bottle and put it in my 3 year old lawn tractor engine, while the engine was running just to see what would happen. It was a 19 horse Briggs and Straton, and like all of them, it ran rough. About 3 seconds after putting that small bit of Best Line in the oil, that engine smoothed out like crazy! I could hardly believe it! You could have knocked me off the seat with a feather right there. Now, I put it in all my 4 stroke engine powered goodies. Its reassuring to know that should in some way, any of my engines ever run low on oil or get run hard, there is an extra edge of protection inside.

Meets my immediate expectations. It quiets down the engine and that is about all you can access when you first start using it.

Very good product. This maybe be over kill but I put in a bottle at every oil change. My engine runs very smoothly using this product.

I love this product for all of my vehicles to keep their engines running clean and at peak performance. That being said, the way they are packaged and shipped needs improvement. My latest purchase of this treatment sent the bottles in a thin parcel with no support or padding around the bottles. One of them either got punctured or loosened up in transit and leaked a few tablespoons of fluid inside the plastic wrap around the bottle and some of it leaked further to get soaked into the parcel too. Luckily I picked it up as soon as it was delivered, but this type of leak poses a fire hazard in my apartment’s mail room and a slip hazard if it had leaked further onto the floor at any point.

Technology is the key to keeping your car running longer

Got a little better gas mileage and engine sounds smooth

I have been using this product for many years; I am very satisfied with it.

This product really works