If it was my choice I'd run Red Line 0w/20 in my Civic, it has a nice 9.0 viscosity at 100 degs C, and like their other formulas contains a large amount of Moly additive, pretty much along the levels of our factory fill oil. I run Red Line oil in my S2000 and recorded significant decreases in aluminum wear (pistons, cylinders, head cam journals) compared to all other oils that I've run and tested.
Unfortunately Red Line is not API certified so Honda could put the screws to me if I ever had an engine failure, I really want to run it though.