Yes, well I think that was the whole point of the OP asking if the car manufacturer’s recommendation of oil to use makes sense for his particular location. For some reason that chart that I tried to link to my previous post did not appear but the charts that I have seen show that the single weight 30 oil is good from 30F to 104F ambient. Whereas the 5w-20 recommended by Honda ( I realize that they have to make that recommendation for the whole world, so it is a CyA posture) goes from -15F to 68F. Clearly in my case, it would make sense to use the 30w. But hey, judging from the previous comments from veteran posters, this is beating a dead horse! ;o) Anyway, FWIW…