Review on Liqui Moly 2001 Valve Clean by Maurice Malek

While I haven't done any scientific testing, fuel economy appears to be significantly better (about 2mpg); my car seems more responsive (more like it was when I first got it); and the sound of the engine is different. These differences are not due to the Jectron, which I use from time to time but didn't put in this tank. I will get more in the future. UPDATE: Upgrade to 5 stars. Now that the entire can has been passed, my mileage is higher than it has been in a few years (about 4mpg better). And the engine feels a lot more responsive! quality goods!