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2021 Kia K5 GT-Line AWD
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So before I purchased my K5, I looked into the difference in the 1.6T and the 2.5T. One of the main differences besides the displacement was that the 1.6 T is GDI (gas direct injection) while the 2.5T is Dual Injection (GDI and multi-port injection).

From what I understand, carbon build up is one of the drawbacks of a GDI engine. A dual injected engine has its ports cleaned by having fuel regularly injected through it so they don't have to worry about carbon build up.

The question I have is this: how regularly should we have the port cleaned in order to prevent carbon build up to become a problem? I know doing so can also help prevent the engine from making a hard knocking sound.

I'm just wondering so as to have some preventative maintenance done to my car and keep it running longer.
 
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