If WW thought it was ok to use the other products instead of oil it would have stated that.
It would be BEST if you managed to get in 2 teaspoons of the suggested oils if possible!
Perhaps when the plan is re-evaluated in the Fall they will make a change.They do at least once a year. So until then for best results Follow it to the best of your ability as it is written for best results!

That's what I have always done.........................it works for me a free Lifetime member.(I will admit it took me years to quit following "my plan" and start following their plan~
Good Luck!