What ever Synthetic Oil is on sale at the time. This week it happened to be Quaker State Ultimate Durability 5W30 Full Synthetic Motor, 5 qt. $20.24 for a 5 Qt. jug shipped with a Quaker State $7 a jug rebate. Hard to beat $13 a jug Full Synthetic oil.
Pennzoil Ultra Platinum Plus 5W20 for the Acura because its readily available at local Wally World
Pennzoil Yellow Bottle 10W30 for the Ram -- readily available & Sopus rebates are hard to beat.