I'll make this short and sweet... 07 Civic A/T, R18 engine, 45K miles, bought brand new and used M1 5-20 every 5k miles till about 2 weeks ago when I put in M1 0-20. My driving habits are very conservative and I do about 70%hwy/30%city daily. The manual says Honda Genuine is highly recommended, and although that may just be marketing rubbish, can anyone familiar with Honda engines see ANY benefit with switching to Honda branded syn blend oil? I guess I would use 5-20 (or 0-20 if it's available). The weight is not an issue for me. I was just curious if I'm missing out on anything that will have any extra benefits for my car I'm wanting to keep forever. On the flip side, anyone see any disadvantages? BTW, I do all the OC's myself and will change it at 5k miles no matter what. I just love doing the work and the slightly extra cost is worth the peace of mind.
Thanks!