Originally Posted By: Nickdfresh
I'm sorry if I missed it if asked already, but what are the dealerships saying about fuel dilution?
Most often, a blank stare. I expect they get very, very few complaints as very, very few people perform UOAs. They may get a few questions about a gasoline smell when checking the oil (among those few owners that actually do that!), but these are easily passed off as "normal".
If you bring a UOA into a dealer, they will be puzzled as most have never seen such a thing. If you push it, they may have a discussion with the manufacturer, but beyond checking for codes and looking at fuel trim, not much else will happen.
OBD2 diagnostics really will identify most fuel dilution causes. For example, fuel pressure loss indicating an injector leak will be flagged as will be a stuck-open thermostat. In other words, if you go in with this complaint and no CEL illuminated, it's likely nothing of consequence will happen. Mind you, they won't say your results are "typical" or "harmless", but will say there's nothing to fix. And even good service departments will be confounded by a lack of corporate help or interest. Ask me how I know...
An exception to this seems to be Ford's response to dilution in early 3.5 EcoBoosts. So, kudos to them.