On vehicles with special instructions, I follow them. This includes many Hondas. They actually do have a special factory fill.
On vehicles without specific instructions, where it is confirmed they use normal oil from the factory, 1-1500 miles is when I change all service advised fluids. This includes transmission, diffs, all of it. If it is in the manual as a fluid to change...I change it.
On vehicles with normal fluids, and a break in, in the manual, i change fluids after break in interval, whether its 800, or 1200, or whatever, once it's up, i schedule a change the next week or two.
My cx5 is a 2019 GTR. This means that oil was all I changed, as the diffs and transmission are either "fill for life", or "verify only".
Once I select a fluid, I use it for life. This means I select common things that I can buy anywhere CONUS. For this application, Mobil 1 Extended Performance due to low NOAK, Ca, and Dexos G2 and Hot Tube specs as well as very solid anecdotal reports from UOAs, is what I went with in 5-30 oem weight.
I now have 41,594 trouble free miles and am enjoying it just fine.
Here is lifetime mpg. My vehicle uses no oil that is measurable. I change it every 5k miles.
View attachment 225382
I have fewer miles but 26.7 is the exact same lifetime MPG that I have. I expect it to go higher over time. I did the same thing, did my first oil change at 1000 miles or so. I buy the exact same oil each time too, but it's really not necessary to do that. I get Castrol edge extended performance.