The voluntary carbon market has long overlooked one of the most impactful streams in the circular economy: used lubricating oil. The U.S. EPA's long-standing comparison makes the case in one sentence: it takes 42 gallons of crude oil — but only one gallon of used oil — to produce 2.5 quarts of new, high-quality lubricating oil. Every gallon collected instead of dumped, and every gallon re-refined instead of burned, avoids real emissions. Yet mainstream registries offer no widely-used pathway for the small collectors and re-refiners who do this work every day.
That is the gap the CXF framework was built for. CarbonXFuture, a Fort Lauderdale company founded by a 25-year veteran of the oil business, operates a published methodology for quantifying avoided emissions from used-oil activity — quantified under its own internal CXF Quantification Methodology v1.0-draft (August 2026) — EPA-governed parameters on the credit side, credit-minimizing literature values elsewhere, pending independent GHG/LCA expert opinion. The earlier ACR-derived interim parameters (Feb 2019 methodology, now inactive) are withdrawn and reconciled in the methodology. It covers three activity types:
- Collection (CXF-CO): documented volumes collected and diverted from improper disposal or uncontrolled burning;
- Re-refining (CXF-RR): used oil processed back into base oil, displacing virgin crude-derived production;
- Full chain (CXF-FC): not offered — a full-chain contract would double count collection and re-refining of the same volume (methodology §8).
Each CXF credit represents 1 tonne of CO₂-equivalent avoided, and none exists on a promise alone. The lifecycle is documented end to end: a member submits monthly volumes with evidence — weighbridge tickets, manifests, permits — the CarbonXFuture desk validates the report item by item, and only then are units serialized in the public CXF Registry, where anyone can check a batch's status without an account. Retirement produces a numbered certificate verifiable at /verify.
One thing CXF credits are not: registry credits. They are proprietary, desk-validated platform instruments — distinct from credits issued by Verra, Gold Standard, ACR or CAR, and always described as such. What they offer instead is speed, full public traceability, and a quantification basis published openly in the CXF Methodology and contract specifications for anyone to examine.
For collectors, the numbers are published and strict: 6.3 tCO₂ per 1,000 US gallons under the CXF Quantification Methodology v1.0-draft — but only for volumes with a demonstrated uncontrolled-combustion baseline, documented and delivered to a re-refinery; volumes diverted from energy-service burning or dumping earn 0. The FAQ covers the practical questions, and the calculators turn your own volumes into an indicative number in seconds.