I worked for the largest used oil recycler in the western U.S. for several years. You can mix a reasonable amount of old gasoline in the used oil that you take to the recycling center. The used oil in most parts of the country gets blended into cheap fuel for the steel mills and cement kilns. The gasoline just adds BTUs. At my former company did not fuel blend used oil and we made recycled base oil (water white pure petroleum) and sold it to a number of companies for recycling into lubricants like greases. Also, there's a little bit of used oil in every can of WD-40 and 3in1 oil. That company (same company makes both products) was one of our consistent customers. Joe