As flow is an insignificant consideration in pc filter use, I don't have that concern in my filter selection. Been many threads/posts confirming that fact so need to beat the horse. Pleats look uniformity looks acceptable to me. Certainly in line with the well respected Mahle in the link. http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2935612 As for age of filter, perhaps with the date code it could be confirmed but I won't speculate. No doubt in my mind it's Purolator made, and it got the job done for the OP for his 5k oci. Really all that matters here. But as with any choice, don't like it don't use it.