14 hours, from NJ to about 30 miles before the Quad Cities area (Davenport, IA).
I just did 515 miles in my ML 320. Avg 70 mph, 25.7 mpg in a little over 8 hrs. I couldn't do it in a lessor vehicle. Still had over a qtr. tank. Filled up with 1.99 gal diesel starting out.About a year ago, we drove home non stop from Smith Mountain Lake to our home in north jersey straight through. With 2 dogs and a 1 1/2 year old, car and roof box were packed. 480 miles, 7 hours 2 minutes, average speed 68 at 24.7 mpg in my diesel GL. I was pretty happy lol. Normally its about 8 hours plus stops. Still had over a quarter tank too, wish I couldve shot for a 700 mile tank of fuel!
The comfort definitely makes a difference. A few weeks before that trip I took my golf to maine, about 6 hours each way, and my back was hurting 5 hours into it. I felt fine after the ride in the GL.I just did 515 miles in my ML 320. Avg 70 mph, 25.7 mpg in a little over 8 hrs. I couldn't do it in a lessor vehicle. Still had over a qtr. tank. Filled up with 1.99 gal diesel starting out.
I spent half the year for most of my life driving in conditions like that. I still don't own a cell phone...... last mile being packed-stone road covered in snow, steep-ish uphill grade. Dark & no Cell service on that section, but family knew to come looking for us if we did not show-up 15 minutes after our cell connection dropped-out.
You do some serious driving! My lord!22 hours/~1300 miles from the Grand Tetons to Mount Rushmore then back home in IL. I drank ALOT of redbull that day.
Friend and I did 19 hours straight from Chicago to the Grand Tetons a couple years ago.
I regularly do the 10 hour (~600 miles one way) to the Smokeys or 15 hour (1,300 one way) Rocky Mountain NP straight.
Although it doesn't count for this, my personal best was Chicago -> Acadia -> NYC -> Niagara -> Chicago in 3 days and 3 hours of sleep. I don't recommend it though, this was the trip that made me take sleep deprivation seriously.