I see this thing at the beginning of almost every long drive, after ~60 minutes of a continuous drive with speeds over 140 kmph (if I drive faster, it may show up even earlier). And yes, after I re-start the engine, it disappears and is not showing again till the next long journey.
Funny fact, that the first time this message started to appear, it was showing up earlier and more often (even on usual speeds/roads) but since it was right before the planned oil change, that maintenance eventually fixed it (at least for first 5-6 mo, before my next long distance drive).
The dealer told me (after checking my car's computer) that there are no any errors logged, and "next time you see it, just stop the car on the nearest safe place, check the oil level and if it's OK you are safe to go. Your car can and will eat some oil, so it is normal", but the service guy was not able to clarify why the message re-appears. As for the oil levels - in the beginning, I was not able to use this stupid oil stick correctly, so I don't know how good/bad was with the oil at that time, but now (since I finally know how to read it) I check it periodically and the level is always in normal or slightly above than normal (yup, even when the message pops up).
And because I was not able to find anything on different Civic X resources/forums, I was sure that I'm the only one with such problem