I haven't seen the Blue tube here. The one my supplier can get is the pink and red one. The lube I get looks the same as in the photo, but it's not gritty. The grittiness is what concerns me here.
I do as Joe says, non-white in the motor... with one exception. If it reeks, I chuck it out. There've been a few tubes that were either hard / chunky, or stunk like you wouldn't believe, and I didn't think I could co-exist with them.