The car wash/detailing channels I usually end up with are:

Forensic Detailing Channel:
https://www.youtube.com/channel/UC_4lRohBzY20wjsFGWS0Jzg

Ammo NYC (I've learned a ton from Larry on detailing my car)
https://www.youtube.com/user/AMMONYCdotcom

Three weekly subscriptions I end up watching are pretty common, but I enjoy them for different reasons

Mr. Regular on RegularCars - The reviews bounce between car facts, English lit major and a teen hopped up on Code Red that still thinks dick and fart jokes are funny all the time. Still, I look forward to whatever random, regular daily driver (or motorcycle) is up on Monday. One of my favorite reviews was the Grand National:
https://youtu.be/6u8xlg-q5Xc

Jay Leno on Jay Leno's Garage - Say what you want about Jay. Whether he's funny or not, whether he did Letterman and Conan dirty, whether he's a hack, fine. What you can't dispute is the man knows and loves cars of all sorts for all reasons. His CNBC show feels forced, but every Monday there's going to be an interesting, whether it's an exotic, a classic, a one off custom, something that runs on steam, a prototype... Jay has a lot and knows a lot of people, so there's always going to be something he can review that nobody else can. The ones I like best are the cars he has some personal connection to, like his personal 2017 Ford GT:
https://youtu.be/7-MCdfqL61E

James Pumphrey on Up To Speed - Donut Media has been putting out progressively better videos over the past year and some change. Younger car dudes from California, they do have a different vibe, and while not always the most informative, they are entertaining. And they love 80s style pop up headlights, as this review of the Pontiac Fiero proves:
https://youtu.be/W4N_msrwGjM