Originally Posted By: friendly_jacek
Originally Posted By: djb
I don't really see a thin metal shell replaced once a year as being a significant environmental issue when the ton of steel surrounding it has an average 10 year life.
The problem is with the 0.5 Qt or so of used oil inside filter being tossed at landfills.
There is no way you can keep a pint of oil inside a used filter without really trying. You might have a subjective feeling that it's a big amount, but it only takes a half ounce of oil to make a real mess.
The media-only cartridges look easier for a recycling facility to squeeze dry, but once they need to shred and separate they all go into the same bin.
I'm not arguing that they aren't a good idea, just that the environmental benefit is negligible. The extended oil change intervals, up to 18K miles for BMW, is far more significant.