See How Much CO₂ Your Restaurant Saves by Recycling Used Cooking Oil

Each gallon of used cooking oil recycled into biodiesel avoids approximately 19.3 lbs of CO2 versus burning petroleum diesel. This is based on EPA published values: petroleum diesel emits about 22.4 lbs CO2 per gallon, and biodiesel from waste oil delivers an 86% lifecycle greenhouse gas reduction (peer-reviewed in Environmental Science & Technology, aligned with EPA Renewable Fuel Standard methodology). A restaurant generating 20 gallons of UCO per week avoids over 20,000 lbs of CO2 per year.

Collected used cooking oil (also called yellow grease or UCO) is filtered, dewatered, and refined through transesterification into biodiesel or hydrotreated into renewable diesel. The finished fuel powers fleet trucks, public transit, marine vessels, and increasingly sustainable aviation fuel (SAF). Some volume also becomes industrial soaps and animal feed additives.

Yes. The EPA Renewable Fuel Standard requires biomass-based diesel to deliver at least a 50% lifecycle GHG reduction. UCO biodiesel exceeds that, achieving 79-86% reduction versus petroleum diesel because the feedstock is a waste product — there are no land-use change emissions, no new crop cultivation, and very low refining energy.

A typical full-service restaurant produces 10 to 20 gallons of UCO per week. Fast food and fried chicken restaurants average 25 to 50+ gallons per week. Pizza restaurants generate 15 to 25. Bakeries and cafes typically produce under 5 gallons per week. Multi-fryer kitchens and high-volume operations can exceed 100 gallons weekly.

Yes — and increasingly so. Under the GHG Protocol, used cooking oil recycling can be reported as a Scope 3 Category 5 (waste generated in operations) reduction. If you have a corporate sustainability report, ESG disclosure, or B Corp / Green Restaurant certification, your UCO recycling tonnage and avoided emissions are documentable contributions.

Yes. The Green Restaurant Association, B Corp, and California Green Business Network all credit used cooking oil recycling as part of their environmental scorecards. OilGuyz provides pickup manifests and annual tonnage reports you can submit directly with your certification application.

California's Low Carbon Fuel Standard (LCFS), administered by CARB, creates tradeable credits for fuels with carbon intensity below the petroleum baseline. UCO biodiesel has one of the lowest certified carbon intensities of any LCFS pathway because it uses a waste feedstock. The 2026 program update tightens carbon intensity targets, increasing demand for waste-based biofuels.

Approximately 1 gallon of UCO produces 0.9 to 1.0 gallons of biodiesel through transesterification. So 1 gallon of recycled cooking oil displaces nearly 1 gallon of petroleum diesel — preventing about 22.4 lbs of fossil CO2 from being emitted and replacing it with low-carbon biodiesel that emits 86% less on a lifecycle basis.

California law (Health and Safety Code Section 19310 et seq.) requires used cooking oil to be transported by a licensed CDFA Inedible Kitchen Grease hauler. Most restaurants must keep manifests on-site and produce them during health inspections. Improper disposal — pouring UCO down drains or into landfill — is a violation that can trigger CDFA, local water authority, and health department fines.

Yellow grease is used cooking oil from fryers — relatively clean, reusable, and the feedstock for biodiesel. Brown grease is the food waste, fats, oils, and grease (FOG) trapped by your grease interceptor — much dirtier, harder to refine, and typically processed for low-grade industrial use or anaerobic digestion. The carbon offset benefit applies primarily to yellow grease.