I don’t have quite the endurance I used to, but I routinely do Daytona home to northern NJ in a 15-16 hour trip, 1050 miles. The quicker elapsed times have been in either a Corvette or Golf Sportwagen, with the 16 hour mark driving the Class C. In that, the cruise set at an indicated 70, which is actually a true 68, and stopping just for gas, potty and eating on the road. Usually leave at 5:30am and in my driveway by 9:30pm. Another trip we do annually is to Elkhart Lake, WI. Leave there at 5am, which is a necessity to get around Chicago before the morning rush, lose an hour crossing into Eastern time, and again home in 15 hours in the motorhome for that 900 miles.
My distance/time record is actually Topeka, KS back to NJ, in a GMC 2500HD crew cab towing a 20’ enclosed car trailer. 1250 miles in 18 hours. Left at 5:30am Central and home at 12:30am. That truck and trailer combo was super stable at 70-75; the glitch was the 26 gallon fuel tank and 9mpg meant stopping every 200 to 210 or so miles. That trip was 2007, and being 14 years younger made a different in how much stuffing I had.
These days though, I like to be off the road by 9-10pm. Hence why I’m only good for 1000-ish miles. Also of note, these are just one-shot banzai runs to or from a destination I’m at for at least a week. I’m still working, so maximum time away for minimum vacation time.