Quaker State Ultimate Durability or SynPower?

[sangyup81]

For shorter OCIs and cleaning needs, I go with Synpower. For longer OCIs (a friend recently finished 10k on Quaker State Ultimate Durability and a P1 filter) I like Quaker State Ultimate Durability

 

[shpankey]

It's speculated by many that the used oil analysis for SynPower are not really indicative of their actual additive package as they are likely using additives that simply do not show up on a 20 dollar UOA. I forget what they call these newer additives, maybe someone can chime in.