Without cleaning, deposits can lead to hard starts, lost acceleration and rough idling. STP High Mileage Fuel Injector & Carburetor Treatment is specially formulated to maintain clean performance of fuel injectors and carburetors by helping to prevent the accumulation of deposits. Specially formulated to fight deposit buildup and helps keep fuel injectors and carburetors clean in vehicles with over 75,000 miles. Its made with jet fuel, a high-quality carrier of active ingredients. Cap-less compatible. For over 60 years, and for more miles than anyone can count, STP has been one of the most trusted names in automotive care. STP High Mileage Fuel Injector & Carburetor Treatment: Reduces Engine Friction. Prevents deposit buildup. Saves gas by cleaning dirty fuel injectors. Safe for any gasoline engine. Compatible with cap-less gas systems