Now that's an interesting choice. FWIW, I've been mixing 0W-20 weight oil with 5W-30 weight (50-50%) for as long as Honda has been recommending 0W-20 weight motor oil. I also ran 5W-30 weight for over 10 years in two Civic Si's (an '02 and an '05) despite Honda's recommending 0W-20. Why? Because I'm a belt-and-suspenders guy, and more to the point, I exchanged e-mail with the folks who built the 2-liter Si engines in the Civics (in Swindon, England), and their folks kindly responded with the advice that they continued to recommend 5W-30 weight oil to their customers without regard to what American Honda was recommending to its US owners. Same was true in Germany, btw. Australia, too. (I'd link the e-mail responses here but the Dell computer on which they were stored has long since gone to the Great Reward for dead electronic devices.) Additionally, during the period that I owned the Civics (12 years), a good number of Si owners running 0W-20 weight oil (roughly 5%) experienced camshaft galling issues. The actual cause of the problem was never resolved -- high temps, high rpm, poor maintenance, careless owners? Who knows. What I learned, however, was those of us who had opted for an HTO certified oil (high temperature operation) (M1 5W-30, for example) didn't have a problem. Was our "experiment" dispositive of the camshaft issue? Beats me, but it was enough to convince me that 0W-20 weight oil had its limitations. Since then a "frankenbrew" of 0W-20 & 5W-30 M1 has served me well in eight other Hondas over a 20 year period, so I'm sticking with it.
So, hang in there Griso. I admire your decision-making skills.