Hi-Gear® Throttle Body Cleaner safely and rapidly removes accumulated deposits from the throttle/butterfly valve, throttle body and idle air control valves of the air induction system. It is specially formulated with anti-corrosion ingredients and lubricants, and it is safe to use on oxygen sensors and catalytic converters. For optimal performance, Hi-Gear Products recommends the throttle body be cleaned every 4,000 to 6,000 miles.