X2 on the Redline. I use this and i'm very happy with it.
They also have a race blend for better protection.
With Red Line you really have to look beyond the grade on the bottle. They will always recommend the thinnest kinematic viscosity oil because they have such a high HTHS.
If you want it quiet and smooth, run 10w-40. If you want best mpg or live in the cold 1/2 the year, run 5w-30. 10w-30 is a-ite in many cases. It'll burn less than 5w-30....generally.
Redline appears to be more interested in using the best additive package to make the best oil, not having to use pre-tested additive packages that may be geared more toward fuel economy.
The zinc and phosphorus levels (ZDDP) is much higher in the redline. Iron per 1000 miles is much better. Viscosity retention and flashpoint are much better also.
I love red line, search for my UOAs... i've tried most of the top teir vw502 approved oils in the FSI (Motul xcess, motul specific, total energy), and they don't even come close to touching red line with regards to longevity / performance.
4 qts Redline 5w40, 1 qt Redline w40 Race Redline blows away the competition... Lumps of ZDDP and Moly with the Race oil mix, fuel dilution pretty much disappeared, and viscosity/flashpoint are well within reason.
I would stick with a tested oil like Red Line 5w-40 or GC, but that's me.
Sticking with a single weight is a better idea than mixology IMO..
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