Does he drive it hard? Does he drive it alot? Has he ever had a UOA? Does he drive it in high altitudes? How many miles are on the car? Does the engine get to full temp at least once a week?
I would change it every 5k :ROFLMAO:
I have an electric fan for our Flex...I still own the Flex but I just don't want to do the job for some reason. The part has been sitting in my garage for almost 2 years now, wife asked me recently when I'm going to fix her fan, I told her it has 2 of them and the 1 is doing just fine :p