"HERE IS A TEST"
Bullshit. That Page and that test Are obsolete with the issue SM GF-4 standards.
Amsoil is a top tier synthetic but it is no better than many of the off the shelf synthetics in performance. (I think M-1 and Castrol syntec 0w30 have it equalled or bettered in many areas)
You can get many of the same specs from a heavy duty motor oil such as Shell Rotella T 10w30 if High TBN and a Cst of 11.9 @ 100c is interesting.
But this is silly anyway. These are all bench test, which are interesting for comparative data but do not accurately predict wear numbers, how fast The TBN will fall out or if an oil will thicken severely out of grade (ATM For example) with high miles.
As I said not bashing Amsoil, it's a top tier PAO motor oil, just not the end all of motor oils, I have learned alot from their adds and for that I am gratefull but they do have a wise marketing scheme.
As individuals just by taking interest in such things as this we are providing better maintenance.
With Modernization s of oils however I don't think that using petroleum, PAIO or Esther based lubricants is going to pile up to a hill of beans difference in cost of ownership.. unless you are insane and change a high priced PAO at 3000 mile intervals as a poster said above(M-1 at 3k OCI's!!!).. that adds up
If you are on this board and you get into this hobby I can almost guarantee that nine times out of ten your engine is going to outlive the rest of the trucks usefull service life on public roads. That is unless you have a supercharger with no fuel modifications :lmao:
The internet is a great source of information, but it is also a cesspool of false information, rumors, myth, gossip and shady marketing schemes as well. Don't be an easy mark.