i ve observed, mostly people (owning civic) are using 5w30 rated oils, in multiple forums of PW different experts have written about Total 9000 future.
Search little bit, i hope you will find better opinions.
Its 3.5 liters for changing, 3.6 liters for fully drained engine. 5w30 is too thin and better for new engines in cooler climatic conditions. Better go with 10w30. I use Zic A, its great. No idea about shell or hevoline formula, PW experts can give you better review.