Those prices are good but I swore off M1 filters as they dropped my oil pressure by about four or five pounds. It flows about 50% less than K&N and filters 30 microns versus 12 for the same filter. Already wrote about why I switched off of their oil.
Yes mine is Still Clean and FULL No oil burned (No oil consumption) with the 5w30 Extended Performance..
2500 miles into the oil change it's still a "clean yellow"
mostly idling anyways 1000-1400rpm is typical driving I do avoid having to rev it passed 2k rpm unless i'm getting on the CA-110 with those STOP sign with 5 feet of on ramp entrances and i need to get to 45 mph in a few seconds..
price point it's hard to complain