I recieved my sample bottle on Oct 17 and have used about 3 gal of it, so I thought I would write my review. The equipment brands that I used it in are: Echo, Redmax, Kawasaki and Stihl[4mix]. I have three 2.5 gallon no spill cans that I use for my mix-fuel, so I liked the bottle having oz. numbers on the side. It made it easy to put 4oz into a can for a 80:1 mix. The first thing I noticed when using the Amsoil was the smell, it has a stronger smell than anyother oil I have used. When I used it in my newer equipment, a Echo 280 trimmer and Kawasaki hedge trimmer, I did not notice any difference. When I tried it in my 4mix stuff I noticed a immediate difference in the acceleration and power. In the rest of my 2stroke equipment I could notice a slight difference in acceleration and power. Also I had to slow the idle speed on a couple of things. I do believe this is a high quality oil and will continue to use it. The only negative thing I have with this oil is the smell, but I am getting used to it.