Inspected the media in filters off my 2000 Concorde 2.7, and my wife's 2001 Accord 4 cyl. The Concorde filter had some carbon powder, but less than the last change. Since it is a sludger motor it gets 5K synth changes. On this regimen, I don't think it is making more carbon, but cleaning out residue from past dino runs. It has 80K, and had dino for 60K The Accord filter was used for two runs of about 6K, last run 5W30 Synpower. The engine has 220K and appears to produce very little filter debris. I soaked a strip of media from each filter in gasoline without agitation to remove oil to see if I could see wear materials trapped in the media. I held each strip toward the sun to try to gage the opacity. The media from a short run in the Concorde allowed some light through, the media from a 12K run in the Honda passed no light. If the media was the same from both filters, I conclude the Honda filter had more microscopic particles trapped, making it opaque. They were different PureOnes, the Concorde being newer yellow, the Honda an older blue, and since they are different numbers could have different media anyway. Evidence of carbon powder on the Concorde filter substantiates the need for a filter change every oil change. The opacity of the Honda filter media doesn't verify ability to run the filter two changes, but the absence of wear materials gives me confidence it continues to flow at the end of two runs.