Anything's possible I suppose. The ones I've had pop off I've not checked for oil so that'll be next.If it's not adhered to the glue and just pops off, I don't see how it's any different than a leaky Fram bypass.The oil all over the glue seems telling.
I'm not clever enough to figure out how to do a flashlight test on one of those but I don't have a popper anyway.
