OER Odor Eliminator is non-toxic and smells like fresh green apples. It's a clean fresh smell, not a chemical smell or a cover-up. One 16 oz bottle is enough to do 10-15 vehicles; one gallon can do 65-80 vehicles. Odor Eliminator combines a special blend of advanced ingredients that literally eliminate the odor at its source! Works by attacking the chemical structure of the organic material, destroying the cause of the unpleasant smell. Disinfects by killing odor-causing bacteria to eliminate odor quickly and permanently.