Miles To Go
I have my trailblazer to read out "miles to go" on the dashboard... it is a setting I love! It counts down how many more miles you can go with the amount of gas in the tank. I have found that my light comes on when I have 33 miles to go. At that point, it no longer counts down. Intead, I switch over to the trip measurement, reset it to read zero and plan to get gas sometime before I have traveled 33 miles. So far, keeping my fingers crossed, I have not run out of gas....stretching it out to 30 miles before I filled up.
i do the exact same thing in my trailblazer. you just described my weekly ritual