We analyzed official data on Toyota Avalon engine oil for 5 generations and 12 modifications produced from 1994 to 2022 and figured out the optimal liquids. The Avalon Generations. Avalon XX50 (2018-2022) Engine. Capacity. Change interval. Oil type. Avalon 3.5 V6 24V (CAN) 5,4 L (service fill), Filter capacity 0,1 L.