Not OP, but I can pluralize his anecdata. I've had my car for 9 years (~120k miles - sat rarely driven for a couple years in the middle). The only maintenance I've had is oil changes (2 or 3 times a year, so $100 estimate seems accurate), brake pads (once or maybe twice? average annual cost maybe $50), engine air filter (like $10, once or twice a year), tires (similar with electric - cheaper for my car with 15" wheels). The only unexpected maintenance was an electric short in the windshield wiper (could happen just as easily to an electric. $100 labour and a $30 part from a scrap yard)
That seems massively excessive oil changing for your mileage.
Fun fact - the same car manufacturers tell British people to change their oil every 21k miles or 24 months, and tell American people to change their oil every 3k miles or 6 months. For literally the same car, being driven in potentially identical conditions.
Americans are just changing their oil needlessly! And they have a whole industry of ‘oil change shops’ you don’t get in many other countries to do the needless work! Bonkers!
I follow the manufacturer's suggested interval of 8000km. The same car supposedly has a longer interval in Japan (16000km), but using a different engine and definitely different operating conditions. It's just not enough of a cost or hassle for me to bother deviating from the recommendations.
I do happily ignore the oil change shop stickers that say it should be changed in 3 months/5000km.
