I've just rolled 110,000 on my '21 BTS eTorque 4WD. I've done all my own oil changes and maintenance. The dealer has only seen my truck once, 3 months after new for complimentary oil change. I checked over the engine afterwards, I swore it wouldn't see the dealership again, AMSOIL every oil change since then. I always put top end cleaner additive ever few thousand miles and fuel injector cleaner every other fill up. That ethanol will wreak havoc on engines, unless you find a pump that serves up ethanol free gas (MURPHY USA). Do your own maintenance if your able.