2002 325ci misfire with p0313 and p1353

[ibexpiotr]

Hello everyone,
in advance thanks for your help
little info:
Cars a 2002 325Ci manual with 140k miles
in the last 6 years i owned it Ive put on a 100K on it.

few months ago car started to give me problems.
after i would drive it hard, the next day id get a check engine which would eventually go away after couple hours
a couple months back while driving the car all of a sudden lost power and would shake when given extra gas, check engine came on.

this was around the same time I got a new car so I just parked the bmw in my driveway as I had no need for it.
Now i want to get this issue straightened out. I started by replacing sparkplugs, I ended up also replacing the gasket / sparkplugs O rings as I saw oil get into where the sparkplugs was sitting.
I took the car for a 10min drive all seemed good, but then I lent it to my father and after a 30min drive the exact symptoms came back.

I bought a scanner ANCEL AD310 and got these 2 pending codes: P0313 (misfire with low fuel) and P1353 (misfire cylinder 6).

as I am writing this and reading other threads I realize the next step is to swap the coils and see if the code follows. I will do that tomorrow,
please let me know if there is any other troubleshooting steps i perform tomorrow while im working on the car.

also if i need to give any additional info LMK.

thanks

[MIKYZZ4]

If there is oil in the sparkplug wells, no amount of coil swaps will alleviate the symptoms.
Any oil in wells requires new gaskets.
If they are oil free, proceed with coil swaps,rescan for codes.