Not one of the filters part #s you tried are even on the list of equivalents. (I don't see the PoPo listed in the original list so not sure). Why did you even try them?:rollfinger:Has anybody had a problem with oil filters bottoming out on the threads before the o-ring gaskets seal to the engine? I have a 2011 RZR S and went through 4 different filters before giving up on it. I purchase a Fram 6017A, Mobile 1 M1-110 Bosch 3300 and even the PoPo filter 2540086. The only one that is working is a HiFlo HF198.
I agree with that statement.