(hey Atholl!)
"without oil cooler"
well, that's not terrific is it..?
I wonder what they mean..? Surely all those cars listed had oil coolers on them..?
It must be to do with height of the filter and clashing against the mounting of the nearby parts... If you were desperate, you could always unhook one end of the oil cooler, every service time, just to get the filter over the thread on the pump...