The blessing on drinks:[1]

Water: One recites the blessing of Shehakol over water when drunk due to thirst, as explained in the next Halacha.

Fruit Juice: One recites the blessing of Shehakol over water and all fruit juices, except grape juice, for which one says Hagafen, as will be explained in Chapter.

Olive oil: Olive oil should technically require the blessing “Haeitz”. However, if one drinks it plain, no blessing is required due to its damaging effects. If mixed into a drink, the primary ingredient determines the blessing [irrelevant to the majority ingredient[2]]. If the main ingredient is the non-oil ingredient of the drink, then one is to say the blessing of the drink, which is Shehakol. If the olive oil is the predominant ingredient of the drink, then one is to say the blessing of “Haeitz.” This commonly occurs when drinking an olive oil beverage for health reasons.

[1] Seder 7:11; 202:10; Ketzos Hashulchan 53:1; Encyclopedia Talmudit Vol. 4 Erech Birchos Hayayin pp. 456-466

[2] See Piskeiy Teshuvos 202:12