I got the dino from BITOG. I like my Calcium 3Kppm min, Phosphorus 1150 to 1200ppm min, TBN of 11.0 min and Zinc 1200 min.
The issue with most group 3 and below oils is the adds begin to brake down very soon since the base stock is not very good per say. If you had a group 4 or 5 the basestock would buffer the adds better. So on the lower groups the buffer is not as good so the adds get depleted quicker.
That is the simple version. Moly in the oil is up to you or the user. Wither way I do not care.
Do a search since I think I posted on it. Quick version.
Group 1 is dino (cheap oil)
Group 2 is dino (better then 1 but again like $1.20 per qt)
Group 3 is a hydrocracked dino oil (usually a blend of a low group and a PAO) Better then grp 1 and 2 but for the price, by a real synthetic.
Group 4 is PAO based, good all around synthetic. Amsoil, some Mobils, Racing Royal Purple, etc
Group 5 is ester based, the best out there for synthetic. Amsoil, Redline, Motul etc.
I just changed to Amsoil series 3000 to run and test. I should have there 15w-40 HDD&M analysis in any day now from my
BX22.