I have a set of BF Goodrich All Terrain KO that's been on my truck for a few years now, I'm wondering if they should be rotated each time I change oil (5000 miles) like the standard or can they go longer between rotations? The thing is, these tires are pretty beefy and knobby and I can hardly tell the wears on them (except some fine hairline cracks with normal age), and the car is mainly a city daily driver.