I just write everything I do in a book in the glovebox.
Example:
10/16/23 Chainged Oil and filter, topped trans fluid
11/02/23 replaced all sparkplugs (NGK Irridium)
That way, there’s a history. My last professional oil change was almost 40k miles ago but I’ve changed it so many times after that it’s good to have a log.
I just write everything I do in a book in the glovebox. Example: 10/16/23 Chainged Oil and filter, topped trans fluid 11/02/23 replaced all sparkplugs (NGK Irridium)
That way, there’s a history. My last professional oil change was almost 40k miles ago but I’ve changed it so many times after that it’s good to have a log.