<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by HummahMan:
FYI: Testing of air filters...
http://home.usadatanet.net/~jbplock/ISO5011/SPICER.htm </div></BLOCKQUOTE>
Here's another comparison but not quite as much information.
Bob the Oil Guy