Is ELF Excellium better than GC?

[RI_RS4]

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Forum rules prohibit posting links to other groups, but check out the VW enthusiast boards like TDIClub.com. Those guys have scrutinized oils and Elf is one of the preferred oils for VWs. I have never heard of the oil you mentioned. Is that what you are using now? I would be interested in seeing some of those stellar numbers.

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Tone, thanks. I'll check out what the TDIclub has done on oils. Here's the link to the thread on Renewable Lubricants BioSyn 5W-40. I worked with Terry Dyson to have it specially formulated for the Audi RS4 engine. However, it's chemistry is especially good for any recent VW/Audi engine.

Double-Super-Secret 5W-40 Audi RS4 Racing Oil