The less frequent the starts the less oil is in the right place when you start. But, OTOH, the wear from running is less.
You can't be paranoid about everything, so an oil change a year or maybe two.... (and brake fluid change every 2-3 years)
I sold mine when usage dropped below 1k/year. I figured it was time. I miss it. But I also know it has gone 30k miles in the 6 years since it was sold so it was probably better for the car.
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