I did my own oil change this weekend and the oil filter I pulled out is the wrong one. I did my last oil change in a supposedly reputable local shop.
It is too short (made for previous generation car), and since it is a cartridge style filter, it isn't sealing against the engine, bascially means most if not all oil has been bypassing the filter. The car went like this for 1 year and about 2000 miles. The engine has just 30,000 mile on it.
But I do wanna know what kind of damage if any should I expect. People on this forum seems to know about oil and filter way more.