My understanding is that there is a standardization for specification for lubricants, no secret ingredients . A federal law was passed years ago that manufactures could not void your warrantee by using a non manufactures product as long as it met the proper speciation, motor oils have a number of specs , can not do any harm by using a higher spec , you certainly wouldn't want or willingly use a lower spec oil than called for or paid for

No secret ingredient I guess higher standard of additives? Like for wear and viscosity? Sure can use cheapest anything as long as viscosity right and you change it. Changing schedule has always been wide range of opinions.