<br>There are at least three ways to run a diesel engine on [biofuel](https://www.proactiveinvestors.co.uk/companies/news/159346/mission-newenergy-delivers-maiden-biodiesel-production-to-global-oil-major-24476.html) using veggie oils, animal fats or both. All three are used with both fresh and secondhand oils.<br>
<br>1. Use the oil simply as it is-- generally called SVO fuel (straight grease)
