Got this to try out and see if it would help improve the power on an older truck with higher mileage which we have been noticing is losing power and the fuel economy has also been decreasing. Figured I would try this stuff out for a few reasons. It appears to be a Texas based company making the performance oil additive and because it claims to address the issues I wanted to address. After running the stuff for in our older and high mileage truck, I have definitely seen gains in power and in fuel economy. Thanks TX Performance Oil for making such a great product!My truck was heating up, missing beat and idling was not smooth, especially in cold.Heard about Stiction issues couldn't quite understand but this oil was a life saver.I first wanted to try something reasonably priced and bought this one because of the name Texas!I love TX and am a proud Texan.Smooth cold starts, and noticed that i used lot lesser injectors too.The delivery was as said fast and smooth, will definitely buy again and recommend.Did better then BESTLINE