Why such a small filter on the Civic? Those call for the 7317, don't they? Or does STP not make that size?
Thats what the AZ catalog specified for the Civic.
Hope you had Mobil EP in the oil pan.
That little filter has very little media area.
In this compact size, a premium filter with a lot of dirt holding capacity might be a better choice for extended OCI's.
Pennzoil Platinum 0w20 actually. UOA was sent off today so I'll post that as well once I get it back.