Hydrotreated Vegetable Oil (HVO)
Hydrotreated vegetable oil, often called HVO, is renewable diesel made from fats and oils. Used cooking oil and yellow grease are common feedstocks. A refinery treats the oil with hydrogen so the finished fuel can run in existing diesel engines, tanks, and pipelines.
Grease.org follows that path from the kitchen to the fuel plant: how restaurants set aside used cooking oil, how collectors turn it into yellow grease, and how refiners make renewable diesel and biodiesel from it.
Used cooking oil is also a feedstock for biodiesel, which is a different fuel from renewable diesel. The kitchen step is the same either way. Keep the oil in a container, and keep drain grease in the trap. Grease.org collects that oil. We do not run the refinery.
The pages in this section explain the buyer's questions in plain language: what a clean load is, what a carbon score is, what a chain-of-custody certificate is, and why renewable diesel and biodiesel are not the same product.