You have to be careful with Honda Brake fluid. A similar fluid has to be synthetic to achieve the high temperature rating the Honda DOT-3 fluid has. And it cannot be silicone. I use Valvoline DOT 3 and 4 Synthetic Brake Fluid in my 2005 Accord and it works very well.
The manual says to use Honda motor oil or anything of the same quality.
I would follow the Oil Life Monitor and change the oil when it is between 20% and 10%. I follow the OLM in the 2 cars that have it and I don’t lose oil between changes in either,