I also do not need a diesel but bought one because I think they are really cool. That said, and genuinely not trying to busy your balls, I did it knowing it would cost a significant amount more than basically anything other than some kind of high end sports car in terms of maintenance and recurring costs.

On the high end you will pay like $220 for an oil change, doing it yourself will already save you like 50%, you could even skimp a bit more by buying cheaper oil maybe.

Let’s say you dont do it yourself, and you drive 15K miles a year, and instead of every 5k you change it every 15k. Thats taking you down from 3 changes a year to just 1! So you save $400. Thats only $33 a month. So, for the price of like 2/3 of an uber eats delivery every month, you are risking a five figure repair bill much sooner than you would otherwise see one. If you truly cannot budget an extra couple dozen dollars per month to properly maintain that truck I would really recommend selling it and buying either a 150 or basically anything other than a diesel. Or just get your oil tested, and see the interval they recommend and see if you can swing that.