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Old 09-12-2019, 02:01 PM   #25
F1EA
Scooby Specialist
 
Member#: 448622
Join Date: Jun 2016
Location: Vancouver, BC
Vehicle:
2019 STI SportTech
CWP

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I don't see what's the big deal with carbon deposits on DI engines.... yeah it sucks; but simple to solve/maintain. You do lose some power in the long run, but with how aggressive/reactive the FA ECU is with timing, I doubt it's a reliability issue unless you let it go way out of hand.

My Subaru dealer has the top end cleaning as a regular maintenance item for the 100,000km service (They call it 'Type C' service). So it shouldnt go that far out of hand if you're following manufacturer's recommendations....

All manufacturers are going for more short-term stats and numbers rather than long-term reliability.
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Last edited by F1EA; 09-12-2019 at 03:19 PM.
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