While this is likely only true if the motor is fairly mild, I agree 110%. It always amuses me how people seem to be so concerned about getting the absolute best oil for their motor so they can get the most mileage out of it possible. The body will rust and driveline parts will fall apart long before the motor dies, assuming that it has been given the basic maintenance it needs. No matter how you look at it these are still light duty trucks that are designed with a reasonable life span of ~150k miles.
I have never seen an engine failure that could be attributed to the oil being used, with the exception of some engines that failed due to a bad batch of Shell oil (it was mixed improperly and the ambient temp was REALLY cold). There is always something else that seems to be the root cause.
There are fewer oil "manufacturers" than most people think. A lot of the oils come from the same place; they just have slightly different recipes and different stickers on the bottles.
With all that said, I usually run the farm store house brand synthetic oil because it is the best bang for my buck. No problems so far and both my dad and I have put thousands of miles on our trucks using it.