Question about carbon build up

[pfmusician]

Is anyone aware of anybody running the 1.5T engine for 150,000-200,00 miles or more without ever having a performance issue due to carbon build up? I mean without any chemical or media blasting ever being done.

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[cryptolime]

Is anyone aware of anybody running the 1.5T engine for 150,000-200,00 miles or more without ever having a performance issue due to carbon build up? I mean without any chemical or media blasting ever being done.

i saw a guy on youtube with over 200k miles and he said he didn't have any issues with carbon buildup

 

[pfmusician]

Interesting. I saw someplace that the injectors in the newer civics are positioned in such a way that some of the gas gets on the valve and helps keep it clean. I wish I could find that info again. I wonder if there is any truth to this. I want to keep my car in good shape but I'm not looking forward to spraying cans of cleaner into the engine.

 

[heavyD]

Going by C&D's long term 2022 Si straight line performance degradation at 40k miles I would surmise that carbon buildup may be prevalent as this is the type of performance decline you typically see from carbon buildup.

https://www.caranddriver.com/reviews/a39966270/2022-honda-civic-si-reliability-maintenance/

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