Zero viscosity worries me. Just a bit too thin for my liking. I wonder if Fuchs, Titan Supersyn 5w-40 would be similar.
QUOTE]
The only practical difference between a 0W 40 and a 5W 40 is at extreme low temperatures. (If you have to worry if the pour point of your oil being -54C rather than -45C then I suggest you really are in trouble.)
The 0W or 5W bit is measured at +40C. the 40 bit at +100C. So in the UK the only difference between a 5W 40 and a 0W 40 is of no importance and really comes down to the quality of the base stock.
Costco is about the cheapest I have found on this side of the Channel: £19.99 +VAT