Yes we do. I run my truck on WVO (waste vegetable oil) Fabman is one of the leaders of the Biodiesel on this forum. If you want to run WVO you need to convert your Diesel engine to run on it. It’s best to have a two tank system. One tank for the WVO and one for Diesel. I start on Diesel and when the engine is up to operating temp I switch to WVO. Before I stop I switch back to Diesel. If you have any questions just ask and someone will have a good answer.