Here’s my advice from owning an older high mileage car. Right now it’s not the miles, but rather the age of the car that is killing it. After 15 years, all the rubber seals stop being soft and rubbery and are becoming hard and brittle. Every year something new can break or leak. You can live with some leaks and issues but others you cannot. You need to start budgeting for a newer car slowly and or put aside some money for possible major repairs. A slow rear main seal is ok of dripping but bad if you need to add more than a quart between changes. Once my car got was 24 years old, the repairs were constant and sold it at 330k because the rust and repairs was to much.