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Hey everyone, I'm new here so it's nice to meet you all.
So the car has been feeling a bit sluggish so I ran the codes. I have a miss fire in cylinders 1 and 3. I've also had an oil leak for a while that I haven't been able to figure out where it's originating from. I checked the spark plugs and 1 and 3 have oil on them. I don't really know how to proceed from here. Any advice would be appreciated.
First step would probably be to clean the engine as best you can. That way, it'll be easier to see where the leak is coming from. That gunk could be from anywhere.
Chances are your piston rings are bad, which is why your spark plugs are soaked. Try doing a dry compression test, then a wet compression test (look up the difference if you don't know, but basically you add ~1tsp of oil in each cylinder then do the compression test again), and if there's a large difference in compression, then your piston rings are bad.
As for your misfire, it's probably those spark plugs, but check the coils before you do that (just cycle them around different cylinders to see if the misfire follows with them).
Since your rings are bad, then you're probably burning more oil than you're leaking.