My r 320 wagon has 100,000 miles runs fine but how long do these engines last?

don't know,but a guy on here has a 1995 Toyota Camry 4 cylinder with over 400,000 miles on the clock,still rolling on!he keeps it serviced regularly,and so should you,that's the main thing.Transmission and other Problems already being Reported on your vehicle..anything you have done to your car will be Costly.you may get 500,000 plus out of it