Originally Posted by cherrylula

This is the real answer.

If you don't want your sauce sliding off your pasta do NOT put oil in when you cook the pasta. Traditionally the pasta is supposed to absorb the sauce so if that is how you like your pasta you will fuck it up cooking with oil in the water. Its the incorrect way to cook spaghetti noodles.

The only reason people do that is to keep the water from boiling over, just watch what you are doing and don't be lazy.