My brother-in-law knows a lot about everything :-laf You might have one of them yourself. Well about a year ago he bought a Ford power stroke crewcab, (nice truck) I told him to read the owners manual because diesels were different than gas and also to make sure he changed the oil and filter and the fuel filter. At around 15K I asked him if he had changed the fuel filter and he said he didn't need to because it was running just fine. Well he now has 30K on it and still has not changed it. Now long do you think it will keep running? When it quits how much $$$ damage will he be stuck with since the dealer will tell him he did not do the required maintance for warranty coverage?