20,000 miles between oil changes?

I do 5 to 7,000 miles on full synthetic since new. More miles may be possible but it is a reasonable price for me.

Toyota 0-20w IS rated for 10,000 miles. I have mine changed at the dealership once a year as I only go 5000-6000 miles a year. The record is a BMW diesel that went over 15,000 miles before the computer said to change it. I believe in the 20,000 oil change using Castrol or Mobil 1(yearly is your call) along with a Royal Purple filter OR the Fram 20,000 mile synthetic oil filter as oil and filter technology has come that far as any other tech. NOTE- I grew up in the 3000 mile oil change world (you used 20W in the winter and 30W and it was a COLLOSAL PIA!!!!! So be thankful for the new tech.

Mobil 1 Advanced Fuel Economy 0W20 6 month or 5,000 miles

I'm a bit more cautious on this Mazda engine, that while reliable, does have a tendency to mix combustion gasoline into the oil. My dip stick readings continue to rise over the miles until the oil level is over the fill line. Our family has two Yaris, and they both do the gasoline oil dilution, therefore- I have the oil changed every THREE thousand miles out of 'necessity'. I had the oil sent in for analysis on both cars, and it did indeed come back with over 2% gasoline and a low flashpoint. Since we want these cars to last, I'm opting to replace the oil more often.
Our models are the 2019 Yaris sedan and the 2020 Hatch.

You will never hear me say someone is getting oil changes too frequently. Are you going with synthetic or regular with that frequency?

My guess is that changes at 3,000 miles would be a good solution to your concern and non synthetic would be acceptable.

I have never heard about the oil problem. I will check to see if I am gaining oil in the three Mazda Skyactiv engines in the family fleet.