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hmmm, The Rotella sae30 is a good choice. I watched a YouTube bit on this that showed VW Mexico suggested 15-40 in 2003, and Porsche sells a 20-50 for their vintage aircooleds currently. I think the multi weight might be the way to go.

I'm leaning towards the supertech 15-40 full synthetic, dirt cheap and probably better than any oil these engines were ever designed for, high zinc too. https://bobistheoilguy.com/forums/threads/new-super-tech-15w-40-ck-4-sn-full-synthetic-hdeo-voa-w-pc.382561/ This particular VW has been...

Hi all, I am working on fixing up my aircooled vw that has been sitting for about 5 or so years. I always used to run zr1 sae30 in it, but that has become nearly impossible to find in my area. Looking for a new option, reading around it seems like alot of myths around aircooled oil and...