Oil threads are like a bug light-you just can't resist participating so I'll fly right in. Zap!
Amsoil is top shelf stuff. You can't go wrong using it.
I use Mobil 1 5w20 exclusively. Why? I can get it cheap at Walmart.
About 24 years or so ago when Mobil lost their lawsuit against Castrol for claiming Syntex was a true synthetic (it was actually Group III synthetic equivalent), Mobil 1 joined the rest and Mobil 1 started using Group III formulations. What year that occurred IDK. To me oil changes aren't about changing an oil when it needs to be changed, it's about maintaining pristine oil quality at all times. As such, I change my Mobil 1 every 3K miles. By doing so, I know I always have pristine oil circulating. Is it necessary? Maybe not. But by 5K, 7K or as FCA recommended 10K, the oil is less than pristine due to accumulated condensation, blow-by contaminants, etc. I'd rather be assured the oil is always fresh. Cost? I spend $40.50 for 7 qts. of Mobil 1 at Walmart. I buy Mopar oil filters online for $8.50. I go to a local quick lube that doesn't mind me handing them my oil & filter. They charge me $25.95 for the change less a $3 credit for using my own oil filter. The total 7 qt. Mobil 1 oil change with Mopar filter costs me $71.95 before tax. I think that's very reasonable. The cherry on top is a $5 credit toward a full service car wash with my paid R.O.
Amsoil's great. I'm sticking with Mobil 1 every 3K.