The BG 44K Platinum, No. 208, is designed to clean modern gasoline direct injection (GDI) fuel delivery and combustion systems. Pour right into the gas tank to restore performance and gas mileage, says the company. It removes accumulated deposits from the oxygen sensor and deposits in combustion chambers, cleans the catalytic converter, restores flow to fuel injectors, prevents corrosion, and stays in the fuel system to continue to clean over time and miles.