Isuzu's TSB regarding the lifter tick specifically specifies (is that redundant? <img src="/forums/images/graemlins/drunk.gif" alt="" />) Mobil 1 0w-30 full synthetic. I doubt very much that synthetic blend is gonna do it cuz it is almost totally dino (regular oil) rather than synthetic. Synthetics have higher cleaning abilities and resistance to varnish. I would go with the TSB for at least one oil change to see if it helps your engine peck. My vehicle is a little odd in that the lower vicosity oils (like 0w's and 5w's) will actually increase lifter tick. She likes thicker oil.

Personally, not a big fan of valvoline. The oil analysis don't come back that great. I'd personally go for halvoline (made by chevron), Mobil, Castrol, among others. Please wrap a big "IMHO" around all of the above.