16740 miles, purchased Nov 04. Just changed differential fluids, transfer case fluid, new air filter & fuel filter. Did it all myself with help from this site. It was easy and saved me tons over dealer costs. I have not had ONE Single problem with the truck. Love it. Plan to switch to synthetic oil prior to winter, probably in Dec. I've done three oil changes thus far and am using what ever the dealer installs as far as the oil brand. Getting 17 to 19 mpg combined city / freeway driving.