I was always taught when driving a diesel vehicle to always let the EGTS come down and let the truck idle for a few minutes after a hard run or when towing. I've always adhered to this . F250 in my sig, last night I got on the road(not towing anything), quickly got it up to 80 mph then turned in the median, got it up to 50 mph before pulling up to a roadside taco stand to order food. There were people ordering so out of courtesy I let it idle for about 30 seconds before shutting it off(engine is pretty loud). I know Im probably worrying for nothing but could that quick run to 80 mph coupled with the quick shutdown have damaged the bearings in the turbo? Truck is stock besides a straight piped exhaust and I'm running Supertech 15W40.