Synthetic 5W-20 has no VMs? Amsoil cheaper?

[rrrrrroger]

Is is true that 5w-20 synthoil has no viscoity modifiers in it? Perhaps that explains why Amsoil's Signature 5W-20 is cheaper than 0W-20? Fewer additives?

 

[getnpsi]

A 0w-20 starts out as better base, where a 5w-20 can be made with older/cheaper/easier to purchase material. As a mixer myself (financial more than trying to make magic), I've always wondered if mixing 0w/5w-20s with a thicker 10-30 makes a better oil than a 5w-20/30 off shelf, all things being equal like brand or similar add pack, which they aren't in the first place. Hope i didn't lose you, and not trying to throw out misinformation either.