Thank you guys all so much for your advice. I decided to compromise, so what I did was get some light flavor olive oil and some new vegetable oil spread called "Olivio." Its made with liquid canola oil, partially hydrogenated soybean oil, and olive oil.
So I'm going to try again the right way with the olive oil in grapefruit juice (and this time I'll know to shake them up real good and use a big straw). If I am having a rough time swallowing the recommended stuff this time again, then I'll just down half this tub of Olivio. :)