GrreatTeacher:
Thanks, GT:
Everything you wrote helps and is on the mark. I thought that mileage was considered low, given the truck's age. But, I'm sure you're correct. All my jobs are within a few miles of home, my monthly mileage being some 200 miles. So the gas issue isn't too horrible. I Googled my truck and its particulars and bad gas mileage is a complaint many owners wrote about. Repairs for an old vehicle can be pricey.
What you said is what I've already figured on -- drive it till it dies. I go nowhere to speak of, but traveling beyond the borders of my community might be nice!