Buy OSRS Sacred oil(4)
Sacred oil(4) is a vial of blessed olive oil in Old School RuneScape. It holds four doses. Players use sacred oil to make pyre logs, including redwood pyre logs. Pyre logs are used in the Shades of Mort'ton minigame.
Getting sacred oil in the game takes work. You must repair the temple in Mort'ton to gain sanctity points. Then you use vials of olive oil on the fire altar once the temple is fixed and the altar is lit. Each 4-dose vial costs about 3.6% sanctity to convert, and you need at least 10% sanctity to start. Players can make about 300 to 400 sacred oil per hour, and a higher Crafting level helps.
The minigame can be risky too. A combat level of at least 81 is recommended so loar shades do not attack you while you build. Sacred oil is also a low volume trade item, so it can be hard to find.
Buying Sacred oil(4) skips all of that. You get the oil you need for your pyre logs without repairing walls, grinding sanctity, or dodging shades.