Thanks guys. I'll admit to not being an expert on most of this stuff and come here as a source of knowledge, so I really appreciate the recommendations. I'm aware that a lot of the recommendations in the US are based on meeting CAFE standards, and I was pretty sure that was the case for my car as well. I'm inclined to bump up the viscosity a bit in the summer. It's been over 110 degrees 50 days so far this summer, so no joke. Leaning towards sticking with Mobil1 0W-20 EP most of the year and 5W-30 during summer. How's M1 5W-30 EP? I should have mentioned that I was able to stockpile a bunch of Honda A01 Filtech filters before they became unavailable, so I'm set there for a while. Is the consensus to keep the OCI closer to 5k on this motor?