It depends on the particular model/engine but the main effect of putting too much oil in is that the crank is runing too deep in it and will throw it around so much it can pressurise up the side of the piston and into the combustion chamber and be burnt or burst seals at front and rear of crank. High revs will almost certainly do that. With an older design engine, I might risk driving very very gently at low revs a short distance but I don't know enough about these engines and their very thin oil (which will get through spaces thicker oils won't) to advise.
On the main thread topic, the confusion seems to be whether any diesel Civic now has a
DPF as standard. The handbook is too vague, talking about cars with and cars without and not clearly saying "since....a
DPF has been fitted". Whether or not later cars have a
DPF affects which oil spec is needed.
The various grades in the handbook all have no upper ambient temperature limit so the deciding factor is how low a temp you are going to experience. 10w cut off is -20C and 5w cutoff is -25C. Anything lower and 0w required. Make should not matter as long as spec is same (my local dealer uses Elf).