The Castrol A3/B4 5w-30 is SL, as seen on the bottle pictured in the thread, since you don't get to have 5w-30 A3/B4 here in SN; the same applies to their 0w-30 A3/B4. As for its VI, I'm not worried about the value as long as it's somewhere reasonable for the grade. The bottle is from Wakefield Canada, and the datasheet is from their site. Given Castrol's historical record on data sheets, one may or may not believe it, but at least the OEM approvals are listed, and the numbers are plausible, and we're not just peppered with a bunch of minimum and maximum testing values.