Small company and we just picked up a used Ford box truck with a Diesel it's an "07" I think its a 6.5 or a 6.0 diesel I am not sure? The truck only has 1,700 miles on it and it sat for quite some time. The question is should I run the oil that's in it to brake it in more or should I change it because the oil has been in there since "07"? Is there a brake in oil in it?