I ran the dealers Castrol for 20-30k miles. Switch to Motul and my temps went up easily 10°F, it would settle down at around 230°F. Catrol never went above 220 unless I was stuck in traffic. So Motul would creep up over 230 at times.
Then I switched to LiquiMoly Leuchteifeifafehffhefh. The oil temps better match Castrol and sit around 220F unless stuck in traffic. BUT the LiquiMoly gets up to temp much quicker than the Castrol ever did.
I used light 5w-30 Edge and 0w-30 Mobil 1 SL in my APR 2.0T 6M and had ultra low wear.... With all the advantages of light oil.
It is the same with both Redline 5W-40 and Liqui-Moly 5W-40. I usually run between 190 and 202 degrees for oil temperature.
Everyone pushes whatever brand they use but when you're talking group 4 oils you're splitting hairs to some extent because they are premo quality. I've run them all and if I had to pick I'd probably throw my hat in for Liquimoly Leichtlauf High-Tech 5W40. That's the full synthetic version. Watch out there is a synthetic blend version they sell now, not as good.
Decided to go back to (and probably stay with) Liquimoly Leichtlauf 5W-40 (the blue bottle that says fully synthetic).
I've had issues with Mobil1 0w-40 oil, even though it "meets the spec", and switching to a different brand resulted in less timing chain and valve train noise, and quieter cold starts, which typically means less wear, so I switched.
If it's a stock engine use 5-30. I use Mobil 1 full synthetic 5-30 in my b18c and it's been good for thousands of miles.
Liquimoly in all my VW's. 5w40. Liquimoly in all my friends VW's as well. Everything from a Mk4 2.0, to a MK7 R, to turbo R32s. ****s the best.
I run LiquiMoly, zero issues.
I use the Leichtlauf High Tech Engine Oil (5w-40). It's TBN is quite a bit higher and I think the evaporation loss is lower.
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