Every manufacturer has gone to great lengths to make sure you can't work on your equipment. It's why John Deere is being sued and investigated for its practices.
On July 8, the Federal Trade Commission and the Attorneys General of Illinois, Arizona, Michigan, Minnesota and Wisconsin filed a joint motion in the Northern District of Illinois (Case No. 3:25-cv-50017) asking the court to enter a stipulated order that would resolve their right to repair...
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It's also why we don't have a dipstick or drain plug on the transmission for these trucks. Fer crissakes, i got a brand new 2500HD rig that's designed for work and I have no idea if it even has transmission fluid in it, nor does it have an external filter. GM can fuck right off along with the commies at JD.
I think for the most part people agree with you on many things. You've shared some good information. I think the disagreement is primarily with the fact it's sometimes delivered as absolute. I agree with you, the Range module is a good product and Amsoil is as well. I just like to give people a little grief once in a while.