eco-SPRAY All-Natural Additive - Cleaner Emissions. Better Mileage. Improve Mileage - One bottle applied to yourair filter every 3000 miles canimprove mileage between 8-40%. Reduce Emissions - Test results show an almost immediate reduction of carbon monoxide, hydrocarbon, and nitrous oxide gasses with the application of eco-SPRAY. Increase Power - By helping to optimize your air to fuel mixture, eco-SPRAY can increase the power of your engine to help your car run smoother, with quieter engine idling. Cleaner Engine - Deep clean carbon deposits from your engine for cleaner, more efficient operation. All-Natural - Organic formulation made of reverse osmosis water, fish polypeptides, seaweed, and Hinokitiol.