maybe we should just do a poll....or something like that.
10w-60 seems like too wide a spread. most recommendations are aound 10w-40, 15w-40 or even 5w-30.
put it this way, how important is the health of your engine? if you don't push your engine all that hard, you should be pretty right with regular run of the mill oils.
however most people agree that fully synthetics are the way to go for hi-power engines that are 'opened up' on a regular basis.
motul chrono and redline are two oils that seem to be trusted by almost everyone, however they're expensive, soooo to answer your question (sorry i work for the govt so i like to run around in circles confusing people before i actually get to the point and even then it probably doesn't actually answer your question but by then you're over it and just nod and say ok and leave) i think i've seen fairly low opinions of castrol edge on this thread. although i THINK (don't quote me) sydney kid uses castrol products on his track car.
or you might want to type the word castrol down in the left corner there