WhiteKnight, after your Dads experience I took my truck in for oil and filter service (came with coupons when I bought it) I like to use the Stratpore Fleetguard filters. I bought some from Geno's. I asked the service adviser if they had any problem using this filter and warranty issues. He looked at me like I was crazy and said that Fleetguard made the Mopar filter and the Stratpore was just a better filter than the Mopar they regularly use. I had them note on the work order that they used a Stratpore filter. I am sure that most dealers in my area would not have a warranty problem with anyone using a authorized filter and doing their own oil and filter changes. Just keep your receipts for the oil and filter and keep a record of the mileage and date.