Good afternoon BITOG,
Had the trusty 4Runner in the garage for an oil change. Last looked at the air filter back in the spring when I last serviced the truck. The filter was dirty then as it was a year ago when I installed a filter minder. Since I installed the filter minder a little over a year ago it's read 8" of restriction, I was tempted to change the filter a year ago but when the gauge still said it was ok I decided to see how much further I could go based off the gauge. Well at least a year is the answer, this filter is far far dirtier than I'd normally let an air filter get based on a visual inspection yet was still only yielding a restriction of 8". Basically it could've gone further. Silicon readings on the UOA have been steady for as long as this filter has been in service. I only elected to change it at this point to see if I could get lower silicon numbers with a fresh filter. My original intent was to run the filter to 11" of restriction then change, perhaps I'll do that next time. Outgoing filter was a Car Quest premium blue, new filter is a Napa Gold. Enjoy the pictures.
Filter was in service for 5 years and just shy of 40,000 miles.
Had the trusty 4Runner in the garage for an oil change. Last looked at the air filter back in the spring when I last serviced the truck. The filter was dirty then as it was a year ago when I installed a filter minder. Since I installed the filter minder a little over a year ago it's read 8" of restriction, I was tempted to change the filter a year ago but when the gauge still said it was ok I decided to see how much further I could go based off the gauge. Well at least a year is the answer, this filter is far far dirtier than I'd normally let an air filter get based on a visual inspection yet was still only yielding a restriction of 8". Basically it could've gone further. Silicon readings on the UOA have been steady for as long as this filter has been in service. I only elected to change it at this point to see if I could get lower silicon numbers with a fresh filter. My original intent was to run the filter to 11" of restriction then change, perhaps I'll do that next time. Outgoing filter was a Car Quest premium blue, new filter is a Napa Gold. Enjoy the pictures.
Filter was in service for 5 years and just shy of 40,000 miles.