I went through a phase, while using DM's car a lot, of having to change flat tyres (she really needed a full new set!). DM was home all day, had 3 teens looking to use it regularly, school and activity runs, shopping etc to do, while living outside a village - so the car was quite vital! DF was out at work 12hrs+ per day, so it really was best if one of us teens sorted it (DM has a bad back) - and it was more often than not left to me as the eldest.
I have changed tyres on Christmas Eve one year in the pitch black, pouring rain on a dual carriageway - 2 guys stopped to help as I just lifted the fresh one onto the wheel, so in fairness they did do the nuts back up for me, but I think they were surprised to find I had it jacked up, nuts released and the old one off, new one out ready to go on, when they stopped. And a LOT of traffic passed me in those 15 minutes or so!! (I was on the way to see DFiance at the time, as both family dynamics were such we wouldn't see each other until 26th/27th again).
I also get mechanics, as I often drop off the cars for service, asking what's wrong and being surprised that I know, and that I know when the oil was last checked (as I do my own) or tyre pressures checked (I also do my own) etc. DH does do his as well, but less frequently.
He also is surprised to realise all the mechanical type maintenance things I get up to quietly - like checking/cleaning filters, emptying gutters, testing smoke alarm batteries, unblocking sewers, ...as problems arise. I think I got used to being "the man of the house" when he was away for 2 weeks in every 4 for over 4 years and things would not wait until he got home again.