I've read some of the reports, as I am planning on buying the Skyactiv-D myself when it becomes available in the U.S. in the fall. I'm not even a Mazda owner at this point and have never owned one. From my perspective, there is zero evidence that the 2.2 liter diesel engine is less reliable overall than any other diesel engine. Certainly some owners have had issues with oil level, but again, no evidence that those issues are an inherent flaw in the basic engine design that affects anything but a small minority of vehicles and/or ones that are operated under unusual usage patterns. The people who don't have issues with their engines don't post on forums, so even if 200 separate people have posted about this issue (and that's probably a stretch), there are literally hundreds of thousands of people who aren't having the issue or it isn't a big enough problem to warrant internet posting.