 occasionally it will make a noise like a chain, whether that's a stutter motor or not, I'm not sure, or whether it's something else, and I'm trying to diagnose that problem right there. Higher mileage? It doesn't happen all the time. Like a whole week has gone by, and I haven't heard it, and then on the last day I did hear it. How many miles are on this? I would say it's over 160. Okay. How good have your oil changes been?