Quote:
Originally Posted by 0w40X1
You mentioned $400 to clean carbon.
Run Top Tier gas, and or put Techron from auto parts store in when idle acts up.
Yeah, I know direct injected engines supposed to carbon worse with oil fumes or leaky valve guides dripping oil.
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Gas type is irrelevant to the carbon buildup issue on the backsides of intake valves of a DI engine (where the problem is seen).
That's the whole point, because fuel/air mixture is not being washed over the backs of the valves, carbon builds up. You can run whatever gas you want, it has no effect on the issue.
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