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Discussion Starter · #1 ·
Hi guys . I have a 2016 nissan frontier with the v6. Has anyone else noticed oil vapor residue at the bottom of the air filter? I have 9,000 miles on the truck and bought it brand new. i have already changed the air filter once. I have changed the oil twice also. I have not driven the truck hard . This is the first vehicle i have owned that does this. The air filter I use is the OEM nissan filter. Thanks guys
 

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Some oil on the filter from PCV system is normal. A soaked filter usually means blowby gasses & oil are getting past the piston rings and bigger issues are at play. My old Chrysler would pump oil into the airfilter housing since there was ZERO expansion left in the rings.
 

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There is a dark area on the bottom of the filter?
All of my Nissans have done that, when I say all, 5 Frontiers, a Hardbody pick up, Titan, Pathfinder, 3 Quests, Rogue, Sentra, 3 Maximas all of them bought new and none ever ate oil or had any engine or oil related failures.
I’d say all is well, check each oil change and replace filter at least once a year.
Enjoy the truck and welcome to this forum.

Clint
 
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Discussion Starter · #5 ·
You described it exactly. first Nissan that i have owned . Owned 1987 ford ranger, a 02 V6 tundra, 1994 Lincoln town car 1987Chevy R10. etc . throttle body usually had a port that the pcv valve connected to. .Thanks for saving me the time and hassle of uploading pictures and crap.
 

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When you say bottom of filter you mean where though?

1)The side you see when you pull off cover that's the side that is flat (with gasket around it) ?
OR
2)Pleated section side ?
 

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Hi guys . I have a 2016 nissan frontier with the v6. Has anyone else noticed oil vapor residue at the bottom of the air filter? I have 9,000 miles on the truck and bought it brand new. i have already changed the air filter once. I have changed the oil twice also. I have not driven the truck hard . This is the first vehicle i have owned that does this. The air filter I use is the OEM nissan filter. Thanks guys
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Auto part Radiator Automotive exterior Grille Metal


My P4X with 26,000+ miles on it, found oil residue on the engine air filter.
 

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That is normal. There is a resin material in the factory filter that binds with the dirt and makes it look wet, looks oily. The bottom is just how the airflow through the housing goes. Completely normal and expected.
 

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BTW the front diff expansion vent does not exhaust into the airbox, its straight to atmo, in case anyone was wondering.
 
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BTW the front diff expansion vent does not exhaust into the airbox, its straight to atmo, in case anyone was wondering.
RyanD is correct. Also, the PCV vents directly into the upper plenum, and the static vent on the drivers side is part of the intake with the Nissan burger on it so it is also down stream from the air filter.
 

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