Mobil-1 0W40, Mobil Delvac Extreme 10W30, M1 0W20, 5W30,10W30, 15W50, Mobil-Tri Syn all flavors, M1R 0W30, Castrol Edge 5W40, Castrol Edge 0W40, GC, Mannol Ester Plus 0W40, Red Line 5W30, 0W20, 0W40, 0W30, Fuchs Titan 0W20, VP Racing 5W30, M1R 0W30, Penrite 15W50, 5W40, 20W50, 5W30, 10W30, Total Quartz 5W30, 10W40, 5W20, Amsoil 5W30, 10W30, 15W40, 5W40 multiple flavors, Chevron Supreme 5W30, Havoline DS 5W30,5W20,10W30, PP and PUP 5W20,5W30,0W40,5W40, RTS 5W40, Motul 5W40, 10W40, Castrol Syntec 5W50, Castrol GTX 5W30, 10W30, 20W50, Gulf/Sunoco/Phillips 66 5W30, 10W30, BP 15W40, Valvoline Premium Blue 15W40, ESSO 20W20, 5W30, Multiple Flavors of Ford MotorCraft 5W20,5W30,10W30,Pentosin 5W30,10W30,20W50,BMW10W60, Wolfs Head 5W30, 10W30, 20W50, Quaker State 5W30, 10W30, 5W40,5W20, Cenpeco 10W30, 10W40 and 20W50. I know I am leaving a bunch off but that is a lot remeber. No one has ever asked me this. I forgot to add Valvoline Restore and Protect 5W30!
Now if you asked me what I have used the most the last 20 years it would be mostly what I can purchase at Walmart off the shelf. That said probably most of that 20 years I would purchse 2-3 different MTL's, ATF's and Oil every year from Boutique Suppliers and from the internet.
M1 0W40 and 5W30 are go to oils for me. If PP/PUP or any other name brand synthetic is on sale though I might switch brands. If something is on clearance I am all over it. I got Mannol Ester Plus for $12 a gallon on clearance from Amazon. I got Delvac Extreme 10W30 for $11 a gallon from NAPA, 2 years ago I think it was I got S-Oil Seven Gold 5W30 for $9 a gallon again clearance from Amazon.
So while I keep comming back to Mobil-1 since 1988 I am all over the map. If it intersts me or is on clearance I am going to try it! I have not used a Fram oil filter for instance for over 20 years but I just go some from RockAuto on clearance for $1.50 each so I got 14 of them.