Napa ProSelect 1040 Oil Filter, in use for about 3 months in my mom's '03 Malibu. 3,100 miles on the filter, driven during the coldest months of the winter in a 50/50 highway combination. Oil used was Valvoline MaxLife 5w30. She drives the car very gentle and lets the car warmup for a minute before taking off. This is the 2nd filter in a row I've cut open that had hard, brittle pleats that were all bent up. The oil itself was not very dark and there was no sludge/debris in the pleats. The black junk you see on the baseplate appears to be some sort of assembly glue. It was stuck to it and wouldn't come off, almost a paint-like substance. The pleats broke in my fingers under very little pressure. Just simply trying to spread two pleats, they both broke. The car had its intake manifold gasket(s) replaced about 6 months ago and has had 3 oil changes since.
