Is 162526 miles unusual for 2012 Chrysler 300 Limited 3.6L 8 speed.

My wife purchased a new 2012 300 in November 5, 2012. We are retired so she does a lot of traveling visiting relatives. Probably 60 % of the mileage is on Interstate or main Federal Highways. She finds that 1600 RPM (70/72 MPH) is a comfortable and quite speed. Speeds above this accounts to perhaps another 10%. The remainder is city driving. She uses mid grade Shell or Sunoco gas with top grade every 6-8 tank.
Maintenance is strictly as per owner's manual. Only repair was radiator temp control. Brakes are good. Upholstery as new. Body has several stone dings (touchup painted). Stone dings and windshield chips normal in South Texas.
My question: Is the mileage (162,526) "normal" for this car? Is the power train likely to perform for, say, another 100,000 miles or is it at the end of performing. I am intrigued that it has remained, practically, a new car. We have never had a car where the cruising RPM's was so low. By the way, the 8 speed box has none of the shake, rattle and roll people attribute to Chrysler transmission.
Thanks for any opinion you may offer. She dearly loves the car and would like to keep it around (and a cheap 84th birthday present for her).
Maintenance is strictly as per owner's manual. Only repair was radiator temp control. Brakes are good. Upholstery as new. Body has several stone dings (touchup painted). Stone dings and windshield chips normal in South Texas.
My question: Is the mileage (162,526) "normal" for this car? Is the power train likely to perform for, say, another 100,000 miles or is it at the end of performing. I am intrigued that it has remained, practically, a new car. We have never had a car where the cruising RPM's was so low. By the way, the 8 speed box has none of the shake, rattle and roll people attribute to Chrysler transmission.
Thanks for any opinion you may offer. She dearly loves the car and would like to keep it around (and a cheap 84th birthday present for her).
0
Answers
You can keep ANY car running for a million miles if you want to spend the money to do that. I think with most older cars, there comes a "tipping point" where you decide to let it go. You'll know when you reach that with this car, so for the moment, I'd just keep doing whatever you're doing.
If you want to know the statistical probability, then around 225K miles is about right---but some cars go more, and some, of course, never get that far.
I have a Dodge truck with 240,000 and going strong, but recently I had to do a fair amount of front end work--it just wore out--not a defect, just old age. So yeah, $1,200 is a lot to spend on a truck worth $2,000, but since it runs well and looks decent, I found it worth doing. Now if the transmission went out, then I'd probably dispose of the truck.