By mistake I bought some of Mobil's extented life oil. So it's been in the truck for 13,000 miles now. I've added 3 more quarts since I put it in and left the filter there during the whole time. I just ordered a kit from blackstone. About how long before I get this kit. With next weeks schedule I'll probably knock off 1 of the remaining 2 thousand miles I have left before the oil change. I'm planning of posting the results and if anyone wants to disect my filter let me know.