Started using Liquimoly 5w-40. Wow what a difference! 3/4 qt. per change cycle. There really is a difference. Same spec as the others though.
I replaced the cam adjuster magnet and haven't had a problem since and I changed the oil( I used liqui-moly this time).
Last change I did I switched to liquimoli 5-40 and I used a can of Cera tec. Noticed a bit of quieting from the engine after a few miles of circulation and after nearly 5k miles I'm only down mayyybe 1/4 QT. So far so good at 131,000
Molygen (the green stuff) is recommended by Liquimoly for VW 502, but it does not actually have official approval from VW for the 502 spec. Just something to be aware of. I buy the liquimoly leichtlauf which has the official approval from VW.
I just stick to LiquidMoly. It's been in there since I bought it and the difference of $20 bucks over the course of 10K miles isn't that big of a concern. It's worth the slight piece of mind.
I live on the west coast and use 5w40 LiquiMoly from NAPA @ $36/5 Lt. It made my CF life go from replacing every 10k miles to getting nearly 20k miles/CF.
I've run somewhere between half a dozen and a dozen oils over the last few years with oil analyses for all of them and both the analyses as well as my own personal observations favor the LM by a bit over other high quality full synthetics offered by Motul, Redline, etc. Specifically you want this one: https://www.amazon.com/Liqui-Moly-2332-Leichtlauf-Engine/dp/B00LIC29H6
I've doubled my cam follower life, from 10k to 20k miles, by switching to LiquiMoly 5w40...and it costs less than Castrol full syn recommended by VW.
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.
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.
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