Re-refined engine lubricating oil
Use of re-refined engine lubricating oil in vehicles is a goal for all Department of the Interior facilities.
- DOI Memorandum on the Use of Re-refined Oil in Fleet Motor Vehicles
- Frequently Asked Questions about the Use of
Re-refined Engine Lubricating Oils in DOI Vehicles
- EPA's Comprehensive Procurement Guideline for Re-refined Oil
- State Websites on Re-refined Oil