At the minimum that is 150 miles per day, 7 days a week for 5 years and 6 months.
165miles per day on a 5 day work week, no holidays off.
If he averaged 55 mph it would be little over 3 hours of driving per day.
if he did the average 3K mile oil change it has had over 100 oil changes.
That is an oil change every 18 days.
Average oil change from the store is 24.99, he has spent over $2500 in oil and filters at the least. Double that if a shop did it.
Using an average of 137.5 gallons of oil in this vehicles life. Or 3.27 barrels of oil.
1994 | 3.0l | Auto | 4wd | Ford 8.8 with discs, Detroit Locked | Dana 35 | 4.56 gears | 5.5" suspension + 1.5" spacers + 3" body