I am planning on using redline 5W40 which is not on the vw approved list but has an awesome HTHS viscosity and I have used it in my boxster S with big improvements over M10w40.
I've been running Redline or Royal Purple 40wt
Using Redline racing 50W in a SCCA 1.6L production engine with an oil temp of about 210 to 215 degree (F) on a hot southeastern race weekend. Hot oil pressure is about 70 to 75 psi at WOT and about 30 psi after a session in the paddock prior to shut down.
For the past 5 seasons, I've been running 5w-30 Mobil 1 but recently switched to Red Line 30 Wt with no ill effects. Typical oil temps (racing on in the Mid-Atlantic area with temperatures and humidity in the 90s) are 250ish with 30-45 PSI hot oil pressure at full chat.
Mobil 1 0w-40 is approved by VW, Porsche, MB. If you don't mind the price, Redline 5w-40 is excellent for our 1.8T engines. From the oil analyses I've seen, Redline has shown a few \"Parts Per Million\" less in metal wear than Mobil 1 5w-30 or 0w-40. Redline has more Moly than most oils. But for me, a few PPM is insignificant over 7k-8k miles. I still use Mobil 1 though cause it's cheaper (Costco) and can be found anywhere.
Never tried Royal Purple but have used Redline a few times before and will continue to use it. Great stuff!
Definitly noticed a difference from dino to synth, through research redline seems to be one of the best....so thats what i use
Wear values perfect ! Looks like Redline is lowering the Moly value some . Your nox is normal but new plugs or wires could help lower the values, Oxd is elevated by cleaning effect of the POE base and lab equipment hates Redline, no problems though. Second change on this oil will drop OXD values. As I said before I have not seen this formulation before but it looks ROCK solid. Good TBN retention.
RED LINE oil.... nothin beats it.. the real racing oil... very expensive.. but you gotta treat ya VR right
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