I put 317K miles on a Toyota…
I put 317K miles on a Toyota Sequoia before selling it in good running condition, and currently have 245K miles on a Mercedes GL450 and almost 200K miles on a BMW 535i. I've only used synthetic motor oil over the past 15 years or so and go at least 10K miles between oil changes. My mechanic told me that I'm wasting money if I change it sooner than that so that's been my interval. Seems to be working since I've never had an issue with the motors in my cars.