Just out of curiosity, when these cars are 5 years old and well out of warranty, how would Rotella T6 hold up? I only ask because some of them will be owned by people who aren't going to want to have it serviced at a dealership or buy the 0W-40. Of course, in 5 years, 0W-40 should be a lot cheaper than it is now. Also, I guess less than forty bucks at Wal Mart is pretty reasonable. Again, just a curiosity.