The neverending discussion about pasta, olive oil and just putting enough water... 10g salt, 100g pasta, at least 1L water e basta così ! No oil or you ruin the pasta/sauce synergy. 😃
I've never oiled my pasta water before. It's really simple: use the minumum amount of water to fully boil the pasta, salt the water, wait until the water comes to a full boil, then put the pasta in, regular spaghetti takes about 6-7 minutes to become al dente.
Oil the pasta after you strain it is the way you prevent it from sticking together.
If you use the minimum and precise amount of water, water will be completely evaporated when pasta is done, so you won't have to strain. I don't know why, but this makes pasta so much tasteful.