Tim, Danny, Matt, Ken,
while I appriciate your input, Mike asked ME!
Well, Mike, since you asked, oil, (evan Mobile1) is cheap compared to the cost of a replacement engine.
WalMart seems to have the best price on Mobile1 in a five quart tote, and Purolator has some high quality oil filters.
I think that 6000 miles is not too often of an O&F change interval.
On our SEVEN quart systems, Mobile1 comes out clean and slippery after 6000miles so what the heck.
BTW, T,D,M, &K, just kidding!