i'm sure your father is a wise man it would do you good to heed his word and he might not know that much about these new diesels but he been around longer so he might have some tricks up his sleeves,i know if i hadn't listened to my dad on some of these things,well i might not be here today...not trying to tell you what to do just giving you some advice.....the Duramaqx TD is a stong engine and it will take a serious beatin before it gives up but it does have a limmit...