2 more points:
How Purolator could help themselves is to send everyone here who is interested free filters for their next changes for field testing and ask for them to be sent back within the next x months. That would be a more sizeable sample, over more quickly, and good PR.
I suspect that they may have found the problem, are confident the latest filters are ok, do not see any need to placate bitog members, and have sent the OP 3 filters for goodwill. But they simply don't have anyone with the time or interest to do much else with this little site.
How Purolator could help themselves is to send everyone here who is interested free filters for their next changes for field testing and ask for them to be sent back within the next x months. That would be a more sizeable sample, over more quickly, and good PR.
I suspect that they may have found the problem, are confident the latest filters are ok, do not see any need to placate bitog members, and have sent the OP 3 filters for goodwill. But they simply don't have anyone with the time or interest to do much else with this little site.