2008 Ford 6.4 Diesel Info, Coolant Killed Motor 148K Miles

No power adders truck totally stock. I do know he had it serviced. But not sure on the coolant. I will ask if I see him again. Just wanted to put out the info that I had even tho limited for those that have a 6.4 to have then checked and serviced. That is a lot of money to put into a 5 year old truck that should have lasted to 300K miles at least with maintenance.This also give others an approximate cost to replace a 6.4 should they need to. The Ford dealer original quote was for 20K he got them down to 17K.