How worried should I be about my compression results?

[Jameson Luttrell]

I have a 2012 Kia Rio with about 200k miles.
My car has been chugging going uphill and accelerating slowly.
I ran a compression test.
190 170 182 189 Dry
193 200 188 190 Wet

How worried should I be about that 170 psi?

Also, I noticed after I cleaned the plugs and put them back in the car ran great for about 100 miles then started chugging again. The cylinder with the lower compression had a dirtier (black) spark plug than the rest of them.
Thanks in advance.

Topic

[Richard Kirshy]

Lower compression can result in higher oil bypass which explains that plug being dirty.
Your dealing with a 10 year old vehicle with 200K on the clock..it’s not going to run like new.
You can try high mileage oil, Perhaps try some Marvel Mystery oil and see if you may have a clogged oil rig and maybe it can clean it up a bit.
But in the end it is what it is, you can baby it along and get as much out of it as possible.

[Author]

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