Hey Science_Guy, I live up in Anderson, IN. I'm Joined their Perfured Customer program and get it at a discount from Amsoil. If you order it from their website. It comes from the warehouse in Colombus, OH. and will be at your house in 2 days. I have used the stuff for years and only say that it the best u can get.
Before i bought my Liberty i had a F-350 7.3 turbo diesel. I used Amsoil products every place i could. after i had racked up over 250,000 miles on the truck and had to replace a head gasket.( runing 35lbs boost will do that

) dureing teardown the mech that was doing the work couldnt believe how clean and low wear the engine was. The Honeing markes in the Cyl was like new after over 250,000 miles. and that wasn't easy miles ether. mostly pulling a 14,000Lbs 5thwheel up and down the mountains out west and in the cold up north.
I was useing the the bypassfilter sys and did oil samples every 6500 miles. I did over 80,000miles before i had to do a full oil change. Up till then it was just the Full flow filter every 6500 and both full and bypass engine oil filters every year.
If i had used Roltella-T i would be changeing it every 3,000 miles and it 14Qts a oil change, that adds up too big bucks fast.
Also the Ford E4OD trans was a POS to put it lightly. I used their Uni Trans oil w/a larger cooler. My temps NEVER whent over 250 and that was Pulling in the summer. I also used it in the rear end as well. Great stuff!!!
BTW. the engine had a Banks Power Pack system, SwampDonkey INJ upgrade , AFe airfilter system, NOS and Propane mod and a 5" catless and mufflerless exhaust. So u could say it was built to pull...HARD!!!
Randy