I thought the fuel warning was SUPPOSED to chime in at about 50 miles to empty.
Mine chimes at 50, 40. 35. 30. 25. 20. 10. 5 miles to empty.
I accidentally went to zero miles to empty once. When the lie o meter said 0 miles to empty, the engine quit from fuel starvation. Luckily I was on the way to refuel, I was a block from the station. Put more diesel in and she started right up. Never again will I let her get down that low.
I'll bet a bunch of you guys have 29 gallon tanks instead of the larger ones if all you can put in is 29 gallons. I can put about 30 in when the tank is bone dry and I fill it to the top of the filler neck.