Yes, you can use synthetic, conventional, or a mix of the two.
Ok, you have a 1993 Honda Accord. Have a question.
OK, you have a 1987 Honda Accord. What is your question?
Honda specifies the use of genuine Honda ATF Z1 only. Any substitute may cause shifting problems. I would not use any other fluid period. Synthetic may be fine but I am not 100% sure so my advice is stick with Honda ATF Z1. You can ask your Honda dealer, but if he say use synthetic get it in writing or your warranty may be void.
Yes it is ok, but, I think that you will be wasting your $$$$, as you will still have to change the oil as per the same time as regular oil.
Ok first of all no one is the C.E.O of a car. But the C.E.O of Honda is Takanobu Ito.
As long as it is not a requirement of the engine, such as with VW's, Corvettes, Vipers, Mercedes, and some other higher end cars, then there will be no problem. So if you have an Accord, like the category you put it in, then you should be fine.
Yes it is ok.
No, it is not okay to use an oil not recommended by Honda. You use the snowblower in cold temperatures that is why Honda recommends a 5 weight oil. There's no reason whatsoever to use 10W-30 weight oil. Use 5W-30 as Honda recommends and nothing else. I also recommend you use a 100% synthetic oil in any air cooled engine.
use it, it is ok to mix
Use 10W30 and do not use 10W40 or straight 30W.
yes
If you are asking about Nitro 70, the answer is a big NO! Nitro 70 is formulated for use in nitromethane and alcohol fuel drag racing engine. It is not recommended for gasoline engine. Use any major brand 10w30 oil in your Honda.