I live in South Carolina and most of the truck stops on the interstate sell Howe's. Most of the truckers I ask point to it. I have been using it for 2 years. The first time I poured it in, it made a big difference in the all around performance of the engine. I have had very little black smoke come out of my tail pipe since. However I, am going to be stitching over to Vegie oil because of how much smoother the engine enjoys running. anyway Howe's is good stuff. CD in SC