Mechanic used different oil weight in my '22 2.5 GT-Line. Should I have him change it out or is it ok?

Been reading through the thread, and I really believe you're over thinking this whole thing and worrying about nothing.
In warmer weather especially, it wouldn't have been a problem.
Only in extreme cold weather (like I get up here in Canada) the 5W instead of the 0W may have had an effect. Even then, it would have been minimal.
I'm also curious why you replaced brake fluid on a 2022? Sounds like overkill.

Just a quick story. I had a 2017 Mazda 6 (bought new) and the manual stated 0W20. Turns out this was due to the American CAFE regulations.
Everywhere else in the world, the same engine in Mazda vehicles recommended 5W30 in the owners manual.
It is only in Canada and the US that the thinner oil is listed.
I switched to 5W30 at the first oil change, and ran it like that for 6 years. The engine was quieter and much happier.
No warranty issues either. Dealer actually thought it was a good idea.
 
""I'm also curious why you replaced brake fluid on a 2022? Sounds like overkill.""

Kia Australia dealer servicing requires brake fluid to be changed every 20,000kms or 2 years.

It costs about $80 as part of the overall service fee and their machine takes about 10 minutes.

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Every 20,000 KMS? Really?
That's only 12,000 miles. Ridiculous.
Cheap or not, that is overkill, and a money grab by the dealer.
I'm 76 years old, and have been driving since I was 14. I have yet to do a brake fluid flush on any car I've ever owned. Never had issues.
My current DD is a ten year old Lexus RX 350 with just over 100,000 kms on it.
Mechanic replaced all four rotors and pads at 90,000 kms and never said a word about a fluid flush. Brakes work perfectly.
After reading about this subject the past few years (the internet varies wildly on this subject), I would probably bend a little and suggest flushing the brake fluid at some point, but at 2 years and 12,000 miles? Not a chance.
 
That's got to be a misprint, surely they must mean bleeding the brakes...most people don't even do that every 12k.

(but if you do, you'll probably never need a full flush since you'll cycle through it all anyway)
 
From interior to exterior to high performance - everything you need for your Stinger awaits you...
FWIW Have been running 5W-20 Royal Purple for almost 8 years now and never had an issue. Live in Arizona where it's hot, so if in a very cold climate this might not be ideal.

Always take out 8 quarts and put 8 quarts in. I think Kia suggests 7.29 quarts but have a secondary oil radiator so add a bit more to compensate for the cooler / lines. Oil has always been to the top of the stick, even since new from the dealer in 2018 before any mods.
 
FWIW Have been running 5W-20 Royal Purple for almost 8 years now and never had an issue. Live in Arizona where it's hot, so if in a very cold climate this might not be ideal.

Always take out 8 quarts and put 8 quarts in. I think Kia suggests 7.29 quarts but have a secondary oil radiator so add a bit more to compensate for the cooler / lines. Oil has always been to the top of the stick, even since new from the dealer in 2018 before any mods.
5w30 you mean?
 
5w30 you mean?
Nope, I mean Royal Purple 5W20, and changed pretty regularly. Maybe not ideal for a daily driver, and probably not for really cold climates.

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I mean Royal Purple 5W20, and changed pretty regularly. Maybe not ideal for a daily driver, and probably not for really cold climates.
While it's probably not hurting anything, going down to 20 weight would be better suited to colder climates. For hot Arizona summers, if anything you'd want to go the other way, to a heavier 40 weight.

If you're not pushing the car hard, and have a secondary oil cooler, you're probably well within design temps for 20, 30, or 40 weight. But it might be worth trying Royal Purple's 5w30 or 0w30 next change, and see if it idles any quieter.
 
Nope, I mean Royal Purple 5W20, and changed pretty regularly. Maybe not ideal for a daily driver, and probably not for really cold climates.
What was the motivation behind using a thinner oil (than say 5w30)?
 
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