I think the adding water from the pasta cooking to the sauce came from someone onthe Food Network...maybe Giada? I never do that.
As for adding oil to the pasta water, a spritz of PAM maybe better, if you feel you need to do that. I'm with whoever said it just takes a lot of boiling (really boiling) water to keep the pasta from sticking together.
I can resist anything, but temptation. Oscar Wilde