Mixing QS and Shell 5W20 Synthetic?

[knerml]

Is there any real difference between Shell and Quaker State Synthetic 5w20 oils?

I have an inventory of both and will probably end up with a couple of odd quarts when its used up. Would like to be able to mix them at some point on my Sorento.

 

[bustednutz]

GO ahead and mix them. No problems at all.

 

[pbm]

Awhile back I asked a well known Sopus man on this site a very similar question in a PM.
He told me that the Shell syn is closer to Quaker State Synthetic than Pennzoil Platinum or Pennzoil Ultra and that mixing left-over Shell syn with QS was the better idea.