Yep, this is my easy to find choice. It's why I've been running it even before I needed an oil with VW502 approval. It's never not been on the shelf here. Castrol is hit and miss no matter where I've lived for Euro spec. I used to run the GC 0w30 in my LS1 GTO when I lived in Vegas, but I couldn't always get that either. That's when I first started running the M1 0w40. I've now also used it in my Jaguars and even in Fords calling for 5w20. Obviously none of those cars specc'd these oils, but to be honest I didn't trust the conventional 5w30 for extended drains on the Jags. One obviously was a bit dirty inside when I got it as the oil darkened very fast for the first couple of changes before it went to normal. Not very scientific I'm sure, but the oil must have been picking up something. I only started with euro oils after doing some reading when I got the GTO because at least in the LSX world most thought standard 5w30 was a bit weak for these engines and tended to sound much more metallic/mechanical with a standard 5w30.