update: took the VX in last Monday after another 318 miles and it used 3/4 of a quart. service manager asked for my oil change info and i gave him all of the receipts that i had for oil changes and misc qts for topping off fluid.

i am waiting for him to speak to the regional isuzu rep to let me know what they are going to do. current mileage = 51,343 miles

another update: service manager is supposed to speak to isuzu rep today about oil consumption. right before i exit the highway on my way to wokr this morning, CEL comes on and "Check Trans" light starts flashing.
roadside assist didn't have a tow co in the area, so dealership came and picked it up on a flatbed.
VX is now sitting at dealership awaiting isuzu rep to advise on oil consumption problem and trans problem.

thanks goodness this happend at 51k and not 61k

i'll keep you all posted.
joe