While it's true that all TGDI engines can suffer from fuel dilution, Honda's 1.5T raises the bar. First, there are lots of owner reports of oil levels an inch and more above full. Second, it isn't just a cold weather issue: owners report the same problem when highway driven in warm temps. Third, though the engine is still fairly new, there are instances of CELs, stalls and camshaft replacements. On this board, typical fuel dilution amount in UOAs is >5% when measured by gas chromotography even when summer driven. Hard to find another TGDI engine with that record.
To top it off, Honda's "Fix" seems to have been a failure, with some owners claiming it made things worse. And customer service has been poor, with dealers seemingly instructed to pass everything off as "normal". Thinking about a Lemon Law action? Don't bother, Honda has stopped participating in these, forcing owners to litigate. In the meantime, don't bother contacting your dealer unless you stall or have an illuminated CEL.
If this was an issue of a bad batch of parts, quality control or engine tuning it's reasonable to think Honda would have come up with an effective solution. But as this has persisted for several model years it sure looks like a design flaw that will have to wait for the next engine generation or major rework.
I suppose Honda could be right and this is all harmless. But I wouldn't want to own one and wonder what's going to happen a few years down the road as mileage accumulates.
