Originally Posted By: vinu_neuro
Originally Posted By: BobFout
Originally Posted By: vinu_neuro
Looking at this again.. where's the Moly and Boron? All the OEM's oils from Honda and Toyota to BMW (which uses Castrol), MB, Porsche, Nissan, etc are big on Mo or a combination of it and B. It also uses a more balanced Ca/Mg compared to what we've come to accept as more optimal for wear with how retail and OEM oils (including M1 0W-40 and 5W-50) diverged at SN.
Old formulations, look at Syntec 5w40.
http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2365767#Post2365767
Is that good or bad? Why do OEM's that have used Castrol forever go for a different additive package instead? Did Castrol go the cost-cutting route that long ago? Green GC had an additive package that was more similar to the ones I referenced.
Considering how popular Syntec 5w40 was/is with appropriate spec'd Euro engines over the years, it's a fine oil. Plenty of multi-hundred-thousand mile engines that are like-new.
My understand is OEMs don't generally spec what additives to use except for upper limits on SAPS. It's up to the blender/oil manufacturer to decide what additives and base stocks to use so the oil meets the OEM performance criteria.
I don't think it was cost cutting really, it's how it was in the late 90s with oil?