I have been changing the oil in my father-in-law's 97 Ford Ranger for the last six years every 3 months at whatever miles. It generally works out to three to four thousand miles per change. Now with 170,000 miles on the clock the truck is starting to use a quart every two thousand miles even with Valvoline Maxlife. The problem I have is he will not add oil between changes to keep the level in the safe area on the dipstick. I have even bought the extra quart of oil for him to add and it just sits in his shed. We live around forty miles apart and I do not have the time to check his oil constantly. He will not let me change the oil around his house anymore. He wants me to drive down to the a large parking lot a just be out of the way. He has made comments that the Valvoline Maxlife made his engine tick and he did not really like it. The bottom line is that I am ticked with his attitude. I have changed his oil using my own funds for several years now. I am afraid if I stop the oil will not get changed and he will run the darn thing out of oil. I took pride in keeping his ride up but he is becoming unappreciative. I want to wash my hands of this in case he fails to maintain his oil level between changes. What would you do?
