First off…All of Honda Fluids are made by one of the oil companies…They are a very specific blend to meet Honda’s engineering specs.
There are ATF fluids that meet Honda’s specs besides Honda…however they are as expensive or more expensive.
Engine Oil…There is no Honda Specific engine oil. Just use the right API type that’s stated in the manual.
Power Steering fluid. Again there are other companies that make a Honda fluid…HOWEVER…I found that the Honda fluid from the dealer was the cheapest. It was half the price of the STP Honda fluid I could buy at Pep-Boys.
Manual Transmission fluid is just gear oil. Everyone makes one that will meet the Honda specs. But I think it’s GL-4 and NOT GL-5. If GL-4 is specified do NOT use GL-5…it will eat away at any brass in the transmission.
Coolant - There is no specific Honda coolant. Just get the right type specified in the owners manual.