LtJohnson

I would like to know if anyone has ever had any problems with getting warranty work done. Because of modifications or not changing oil often enough. I am talking about something major like trans. or eng. repairs. Do I really have to adhere to the maintenance schedule, strictly? Even with all of the inspections. How would Ford know if I did the inspections myself, does that count? If I were to go, once, 10K without an oil change, could Ford hold that against me and not do a warranty repair if something major were to fail? Thanks.