(Apparently another difference between North America and other parts of the world)
The maintenance schedule posted here shows 'add genuine injector cleaner agent' every 10,000 km / 6,000 mi. That maintenance schedule is shown in the UK owner's manual; there is no corresponding schedule in the US owner's manual. I looked up 'honda genuine injector cleaner agent' figuring if I'm doing my own maintenance, maybe I should add some. The result was "not needed on North American Hondas". Here is the search/GoogleAI result:
The maintenance schedule posted here shows 'add genuine injector cleaner agent' every 10,000 km / 6,000 mi. That maintenance schedule is shown in the UK owner's manual; there is no corresponding schedule in the US owner's manual. I looked up 'honda genuine injector cleaner agent' figuring if I'm doing my own maintenance, maybe I should add some. The result was "not needed on North American Hondas". Here is the search/GoogleAI result: