SeQuential brings high-grade, clean-burning biodiesel to customers in the Portland OR area. Our fuel is refined from used cooking oil collected from businesses all across the West Coast, including restaurants, universities, zoos and more. This service comes completely free with a collection container, along with a collection schedule that works for you. Your used oil will be transported to a state-of-the-art refinery and remade into a wholly sustainable, environmentally friendly alternative to petroleum-based fuels. If you own a business that regularly uses cooking oil, contact SeQuential today. Our corporate office is located in Building C at 3333 NW 35th Avenue, Portland, OR 97210.