A retired guy in Tulsa handed me his keys and a notebook of every oil change since 1998
He kept a log with the date and mileage for every service on his 1996 F-150, all in pen, 143 entries. I asked why he never missed one and he said "the truck tells me when something's off, I just write it down." Any of you keep a paper log on your own rig, or is it all phone apps now?