Quote:
Originally Posted by Poppyboy
I know what direct injection is. The spent mixture most certainly makes contact with valves after detonation as the exhaust valve opens, which results in some carbon buildup. However, that buildup shouldn't materially affect valvetrain performance at such low mileage, IMO.
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You are forgetting about the intake side of the equation. Since no fuel is hitting it, no additives are there to clean the intake side.