yea and in all actuality.. it probably makes about zero difference.. the motors are dyno'ed before install and the rings are seated.. the difference would be calculated at 50K or more down the road...from beginning to end I only run full synth. but that's me.
ooohhh what a big ol' can of worms each time an oil thread pops up.
So far the only oil related failures I have seen or heard of is "low on oil" issues.. so turns into a personal preference issue...
MORAL: keep it changed and full.....