Use Every 10,000 Miles Or With Every Oil Change
In non-diesel internal combustion engines, gasoline direct injection (GDI) is a variant of fuel injection employed in modern two-stroke and four-stroke gasoline engines. The gasoline is highly pressurized, and injected via a common rail fuel line directly into the combustion chamber of each cylinder, as opposed to conventional multipoint fuel injection that injects fuel into the intake tract or cylinder port.
Since the fuel is injected directly into the combustion chamber, rather than through the intake port, this means that traditional retail fuel additives are not effective on GDI intake valve deposits, because the treated fuel will never touch the intake valves.
Shown: 2014 Ford Focus 2.0L / 46K Miles
Please read thoroughly before beginning. Proper application requires two people. Always use personal protective equipment while working on your vehicle and precautions should be taken around hot engines.
Start vehicle and bring to operating temperature. While the engine is on, pop hood and remove air filter cover, setting filter element aside.
If the engine stutters, throttle the accelerator, maintaining engine speed below 3,000 rpm. Continue until the can is empty. Let run for five minutes longer, revving the engine occasionally, but below 3,000 rpm.