Low fuel lights stress me out. Big time. I never used to get stressed about it until I started doing remote motorcycle trips where fuel is a big deal and you can literally die. I guess the thing to do is throw a jerry can in the back of the truck and just drive it until it quits. The Toyota roadside assistance will give you something like 3 gallons of gas once a month for free.When my range reaches zero there is still approximately 4 gallons remaining. Very very conservative. Crazy Toyota and their 18 gallon tank