Although using conditioners certainly does gel, most of the wear on the leather seats is caused when you slide in and out of the seat. As evidence where the wear is.

That’s why it’s best to use a seat cover at least for the bottom cushion.

i have done a lot to my RX 300, (2000) 15% tint driver and passenger window( including those tiny windows that are obnoxiously by the front windshield ).5% on ALL back windows, including the 2 extra windows in the trunk, over the factory tint. And a 45% tint on windshield. It looks amazing. I have a subwoofer installed, a Bluetooth connection audio in relplace of the CD changer, and HID headlights.
Rx 300 headlights are reflector headlights, the white light will spray everywhere, I get occasional high beam flashes, but when I flash my halogen daytime runners, they are like..what?! and drive by. I wouldn’t suggest HID headlights in reflector housing unless you have strong enough tint that is willing to embrace flashing high beams.

I have been in 3 accidents in which 2 of them were me stopped at a red light and drivers ramming me behind. (45mph plus, I have no idea how my frame wasn’t completely destroyed)

i caused an accident turning left at a light, saw no one coming, was wrong, and I had fluid leaking everywhere. It needed a new realignment and a new transmission cooler. (About $1700). I never replaced the dent on my fender, as it had damage to the frame. I didn’t care so much about windshield wiper fluid(which was ebolished in the accident). I popped out the front bumper myself.

Other than that I take it to my independent Lexus mechanic.

no issues on my end right now, I drive about 6 miles a day and moved inter city to avoid additional mileage.

My mechanic says I will it make it to 300k easily.

Maintain all fluids, filters, and belts. Inspect for loose, worn, or rusty components at least once a year.

chec or change your PCV valve. Cheap and easy 15 min DIY job. Use OEM valve

if you do a google search for changing PCV and Lexus , you’ll find several good videos.