The reason that OEM Honda coolant is so popular isn't because its heat dissipation properties are superior to the others. It's because it is every bit as good at managing heat as the competition, with the added benefit of the proper chemistry to keep all the cooling system components happy and healthy for the entire rated lifespan of the coolant. Some coolants don't play well with each other if mixed and can turn into a goopy gel-like gunk inside the cooling system, which is when the real fun starts. If you stick to OEM, you never have to wonder how well the new and any old coolant will mix.
There's just not that much advantage to be had in trying to get cute with finding something cheaper or better when the factory stuff does a great job and you only need to deal with it once every 5-10 years. I'm sure there are other good options but to me at least, the impetus to find and verify them isn't all that great.
These are similar to all the posts that are pro-Engine Ice. They make sense, but lack any real information. Don't get me wrong, I'm not trying to start any sort of debate, but "Honda" printed on the bottle doesn't make it the best, even for Hondas. The fact is, it also is most likely just propylene glycol, since that's the new in-thing. And its advantages are pretty much limited to this: your cats can drink it and not be a door stop the next day. I could very well be wrong here, as far as what comprises the coolant, but Honda's aluminum block and Koyo bearings don't have any special needs that other Japanese cars don't have.Bingo. No reason to be penny wise and pound foolish here. The factory coolant is guaranteed to work well. Just go with it even if it is $10 or $30 more a gallon. No eating of head gaskets, right lubrication for the water pump, fully compatible with all seals/o-rings, etc. Same deal with Toyota coolant in Toyotas (where I have much more experience).
I'm not trying to be "cute", but I am trying to make an informed decision and not be a naïve consumer, whom we all know the manufacturers key in on. I'm a thrifty consumer. Which is one of the reasons that I was able to go to FL and pay cash for this van. As I said before, if it's better I'll buy it. For me, it's not so much spending a few extra dollars, it's the principal of the matter.