I still have my 21 year old 2003 Lexus LS430 V8 with 155k miles and Zero repairs (normal maintenance of course). Engine knocks from gas were eliminated 20+ years ago when they started using Knock sensors (I use regular gas in my Lexus V8 never a difference in running).
Haha I love this, I also have an LS430, 2004. Same mileage, 155k. I've replaced a door lock actuator and a $114 thermostat that was running COLD (so the car never over heated, lol). Normal maintenance, of course too. That's it in 20 years.
Stunning how the car still drives and feels like the day it drove off the lot. The V8 in that will never quit. The sun will turn into a red giant and engulf the Earth before the 4.3 Toyota UZ V8 quits.
LS430 hands down one of the best cars ever made, certainly the best Lexus. I will NEVERRRRR get rid of it, EVER. Glad you like yours.