I think the thing to remember is theres a reason for engine oil specs. GMXXXXX, Honda HTO-06, Ford WXXXX. Not one shoe fits all. So you have to use the oil that will work for you engine, and that means spec!! We are over analyzing this. So if the oil meets your engine spec, pick your best deal, or favorite color. It's like we keep telling each other, oh to find the oil best for your car, do UOA's and try differnt oils etc... and we just all concluded oils are a balancing act. So the specs are there for a reason. More specs, probably the better, but if it's missing your spec... you're SOL.
Perfect example: my 6.0 Ford Diesel. I've used Motorcraft, Castrol, Shell (syn SL & SM dino). The CJ-4/SM rotella does not state it meets ford's spec, but it states every other spec in the world and from a marketing point... lots of 6.0's out there, means that's a big $ market. why not list it? Check this out... just in the past month(?) or so Shell came out with a CJ-4/SM Syn 5-40. And they list the ford oil spec on their website!!! But their CJ4/SM dino 15-40 does not list it!! why? I can't answer that. Gets better. I looked into Delvac 1 for like $40/gal (OMFG, yes). They also list a lot of specs, but not Ford! Why the heck not? So my only options that I've found which are CJ-4/SM & meet for spec: Dino Motorcraft, 5w-40 Motorcraft & new CJ-4/SM 5w-40 Shell. 3 oil to pick from. End of discussion for my 6.0 oil. I'll pick one of the 3 and Drive!!
Perfect example: my 6.0 Ford Diesel. I've used Motorcraft, Castrol, Shell (syn SL & SM dino). The CJ-4/SM rotella does not state it meets ford's spec, but it states every other spec in the world and from a marketing point... lots of 6.0's out there, means that's a big $ market. why not list it? Check this out... just in the past month(?) or so Shell came out with a CJ-4/SM Syn 5-40. And they list the ford oil spec on their website!!! But their CJ4/SM dino 15-40 does not list it!! why? I can't answer that. Gets better. I looked into Delvac 1 for like $40/gal (OMFG, yes). They also list a lot of specs, but not Ford! Why the heck not? So my only options that I've found which are CJ-4/SM & meet for spec: Dino Motorcraft, 5w-40 Motorcraft & new CJ-4/SM 5w-40 Shell. 3 oil to pick from. End of discussion for my 6.0 oil. I'll pick one of the 3 and Drive!!
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