Honda Civic engine Burns oil and smokes?

I have a 2008 Honda Civic LX with 280,000 miles on the vehicle. I've had a regular oil change, and serviced the vehicle accordingly. But it started burning oil and giving off burning smell. I do understand that the vehicle has lived its life. But I can't help but wonder if there's anything I can do to make the vehicle last longer without having to spend huge amount of money on engine work?

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