Sort of OT -
I did a search a wk or two ago to see just how it's been working out for others...I don't remember coming across much if anything for the HM blend. I was at the mart oogling the offerings in the oil section and thought I would give Valvoline a try with my current car. 2 jugs later of 5w-30 later I was looking at V's site and their recommendations, and as I occassionally tow, they rec. the full synthetic. I noticed that Valvoline's viscosity is on the lower end of the 30wt range where Castrol's HM is in the upper end (less shear stable?).
I know I'm splitting hairs, but with should I be making anything of the differences, as also Valv's spec's on the jug are API SM/ACEA A1, where Castrol's has some Volk. specs.???
I really think I'm making myself sick with all this!\