So I'm seeing a little bit in the air box on my 1988 300. I turned it around to see how long it takes to build up. The smaller patch is after about a month or maybe a little more. And should something be in here?

 

there has been few threads about this lately man I had the same problem search the tread there's a lot of good info on this already

 

Change your PCV valve behind the intake manifold right under the EGR valve. Change the breather on the crankcase and change the small breather filter inside the air box. Make sure you use a motorcraft PCV valve when you change it, they're about $17 at the Ford place but it's worth it.

 

LOL I'd have to look i havent had my air cleaner out in 5 years... and it has 70,000 miles on it...

 

You could change the pcv it won't hurt but that amount of oil on filter looks about normal for a 4.9. The second picture there is supposed to be a filter element inside that, they are glued and fall apart. Someone must have thrown out the pieces.

 

Yeah I've replaced the pcv already. Not sure if they sell that piece anymore do they?

 

I've think I've seen the breather filters with the pcv valve's, so I do think it's still sold.

 

Ok I'll check it out

 

But either way you can't tell this thing uses any oil. Doesn't leak at all. Dipstick shows full for all 3000 miles of every oil change

 

Just got a new breather filter a couple weeks ago so they for sure still sell them.