Just found that the AutoZone outlets here in my area seem to be quietly deleting the German (and Belgian) 0W-30 from their shelves. Listed on their website still, but for full $8.99 a quart. Going to miss the in-store specials. Back to Amazon.
I happily use this product in my VW turbo-4s (a 1.8T and a Mk6 GTI). In a moment of impaired impulse control, I've even used it in a '65 Chevy Corvair (less than 20K miles from new, prior meticulous maintenance with detergent oils). Corvair engine pretty much unmolested, notorious O-ring seals never replaced. Oil leaks are minimal with the GC (remarkable for those things). Occasional lifter clatter on cold start has been banished with GC. Seems about the ideal viscosity range for the engine. Admittedly, this is a personal anecdote… not necessarily an informed recommendation. But I have successfully used synthetics (Mobil 1, Delvac 1, more recently Redline) in a number of rare '50s and early '60s cars since the early eighties.