Years back with my Porsche, I think it was 15,000 miles between oil changes using synthetic. Porsche’s back then had 9-10 quarts of oil, plus you drove the car a little harder which is actually better for the car and the oil. A bigger deal back then and even now is to change your filter every 5000 miles if you are going to wait to change your oil every 10-15,000 miles.
The worst thing you can do to your car is use it to drive a few blocks to the store or to a rec center which will never get your engine hot enough to get the oil hot to burn off any condensation. I had a v8 truck 50 years ago and drove it 1 mile to work. After 1000 miles when looking at the dipstick, there was white gunk all over it. This is what will kill your engine.
Most new cars have engine stat screens that show when you should change your oil, I’ve been using these instead of the odometer. Check out if your car has an ‘oil life monitoring’ system and use that instead of using miles.
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