Hello. I'm new here but have lurked as guest a bit in the past. I decided to register after I noticed my oil was pretty black not too long after changing it. I have a 2007 Mazdaspeed6 with the 2.3 Turbocharged DISI that I run Motul 8100 5W30 in. My dealer stocks it which makes things pretty convenient and at 8000km (the factory recommended interval) I switched from the factory semi-synthetic. Thanks to some searching here I have learned that DI engines really seem to beat up on their oil and that they have fuel dilution issues. My question is how does the Motul hold up against these issues? I realize I should probably get an UOA done, I'm at 22,000km so a due for another change soon. Thanks.