Well that's a pretty good reason.Because I can't get those specs locally at ANY cost. Nothing special about Ravenol just that I can order from their store very easily for a reasonable price.
But on the other hand, unless fuel economy is your primary concern there are equivalently better choices than an A5/B5 oil. And also unless you're starting the car unaided at temperatures of -35F or below the 0W winter rating is unnecessary.