Many gear heads and automotive enthusiasts want to know the differences between direct ... behind the intake valve. When the fuel injector sprays fuel into the port, the fuel will clean carbon ...

Gasoline direct injection (GDI) engines have become ... For GDI engines, products designed to clean intake valves, combustion chambers, and injectors can restore lost power and efficiency.

Primarily found in direct injection engines ... Oil catch cans are preventative more than anything. It keeps the intake ...