4,000 miles and 2 oil changes later Iron has dropped down to 10. Not sure why the 1st two samples had elevated iron. Perhaps from sitting all winter and never really getting up to operating temps when it was used to burn off any condensation? Either way current oil sample has 2500 miles on the oil and all of that was towing a travel trailer. I saw temps as high as 260 at times when going thru the rockies. I also tried Valvoline Advanced Extended Protection and a Fram Titanium filter because it got it onsale much cheaper than the PUP and mopar filter i have been using.