Hello everyone

I know there are numerous threads about B8 misfires, but mine seems to be little different from others (maybe not) but I'll ask anyway, I hope you won't be mad


so around a week ago the car started to misfire, but it was very very "mild" if that's the right way to explain, barely noticeable, usually it would happen between 1-4k rpms, there was no misfire on cold starts and no check engine light either.

3-4 days before that I put 89-grade fuel in the car ( I know, I shouldn't have done it) so I blamed the fuel, I thought misfire will go away once a tank is empty but it didn't, instead, it got worse and worse.

after few days CEL came on, I had it checked and I got a P0302 code (misfire in cylinder 2), so I went ahead and did the usual stuff, changed the coil, changed a spark plug and used injector cleaner just in case it was clogged injector.

Well as you probably guessed nothing has changed.

Today I did a compression test, I got 180-182 in all 4 cylinders, there is no coolant in the oil, and it doesn't really consume oil in general either, so I would assume that internals are ok.

could it be injector going slowly going bad? as far as I know if injector goes bad it is noticeable right away but this starting with mild misfire and going worse and worse day by day is what got me confused.

Thanks everyone in advance

p.s apologies for my bad grammar, English is my 3rd language