Our Services We Produces Essential Fuels and Products Gasoline ECW Oil & Gas Company LLC offers customers and partners quality gasoline, including TOP TIER™ certified fuel. Diesel ECW Oil & Gas Company LLC provides high-quality diesel fuel products. We also are America’s largest producer of renewable diesel. Jet Fuel ECW Oil & Gas Company LLC is a global leader in the production and marketing of commercial, industrial and military grades of jet fuel. Ethanol ECW Oil & Gas Company LLC produces ethanol and distillers’ grains feed products at 12 Valero ethanol plants in the U.S. Subscribe & get 20% off on your first energy purchase, with us Submit