Oil analysis
 

I found an oil analysis for my favorite Redline 5W30 I use in my BRZ (google translator needed) from a Russian oil club:
https://www.oil-club.ru/forum/topic/...comment-270033
It seems no other 5W30 oil can beat it in extreme use and protection characteristics for example lowest ever NOACK evaporation loss at 5.3!
According to their analysis Mobil 5W30 is also a very good oil in this viscosity range.

A couple percentage points with NOACK evaporation doesn't mean much if you already use something under 10% to be honest.

Quaker State Ultimate Durability, Full Synthetic SAE 5W-30 is 8.7% and cost a lot less. A gallon(3.785litres) of Redline 5W30 runs $47.95, a 1.25(4.73litres) gallon jug of Quaker State UD 5W30 is $17.97.

QSUD has a cSt of 10.19 @ 100c and 56.13 @ 40c
Redline is 10.12 and 59.7

If I had the money to blow I would switch to Amsoil 5W30 Signature Series oil, but I can't justify spending that kind of money considering I change my oil @ 6500 miles and I never drive it to where the oil temperature goes above 250f(121c).