My motor doesn't put around long enough to build up lots of carbo and cause issues. It works it's ass off every time it get started. Sees redline once a drive. I've also got a catch can on the evap system. Last time I lifted the intake, clean as a whistle. I'm sure my bearings love me though. Can't wait until I get the day to tear it apart and see what damages I've caused. Lol I try to stay kind to my trusty LSx though. Mobil 1 full synthetic every 3,000 miles with a good filter, plugs every 20k, coolant every 50k, etc.