I got 2 new air filters bout time I change my air filters first time btw since owning this car g37 2013 x model, planning to replace the air filters, clean the throttle body, maf sensor and air idle control since my car is running rough lately and my gas has been tanking for a while for the past few weeks, noticed today the day before replacing my passenger side air filter has engine oil in it..! Only a small portion but it was dripping a bit when taking it out and wiping it. It seems to have just started but concerning none the less and not sure what to do, the air filter is also slightly coated at the bottom with light oil remnants that I've wiped up; any suggestions??? (69,634k miles)

 

PCV valve?

 

I actually purchased a PCV valve a moment before seeing this text I just don't know where the PCV valve(s) is located on my car, I did go to work after wiping down my air filter and the container, no oil on it just a little bit from the filter but doubt that changed much, went hard a bit intentionally to bring anymore possible oil out but my PCV valves should arrive on Tuesday at the very least, although only one side has this issue it's been 30k since I got my car so I should just replace both. If you could give me a description or photo(preferred) of the pcv location that'd be a great help!

 

No longer have the car to take a pic, but take a look at this video.

 

I mean it works lmao, that's all I care about, I was actually just looking through his videos since he had a g35 pcv video thank you, either way putting the new air filter in. I have suspisons of something else happened though because I went to the dealer prior to this only sketchy bc I had somewhere else check my air filters and say they were fine and now this yk? Thank you, hoping for the best!

 

Do you have K&N filters? Also clean out your MAF sensor it could have got oil on them and cause it to drive rough.

 

the previous owner had K&N filters on the car but not anymore just changed and got the maf cleaned and the throttle body, but car is idling around 550-570 in drive now

 

could be the oil from the K&N filter. I have over oiled mine previously (I know dumb move) and it had oil around that area. Could be why you see oil, but as long as you cleaned the MAF you should be fine. For the idle just perform an idle relearn there is a great video on YouTube.

 

Not sure why it won't let me see your reply but I had the relearn and everything done, it did hesitate and act a bit weird till I drove it home, been acting fine ever since but still idles low the place said they put it in factory specs 550-570 and don't want to touch it since that's where the manufacturer settings are at, since that's the case I'm fine, just weird it's apparently not on tbe manual..or very well known??

 

Not sure why it won't let me see your reply but I had the relearn and everything done, it did hesitate and act a bit weird till I drove it home, been acting fine ever since but still idles low the place said they put it in factory specs 550-570 and don't want to touch it since that's where the manufacturer settings are at, since that's the case I'm fine, just weird it's apparently not on tbe manual..or very well known??

And yes I took it back when I told rhem it was idlimg low and they checked it

Edit 2: After turning my car again (trying to find out why my fuel is tanking for the past few months) and putting it in drive it went back up to 650 but kinda went up and down a bit, this was after it sat for 30 seconds and when I turned it off again the thorttle bodies made that relearn complete sound..not sure why but if idle is fine like that again then hazaa!

 

could be the oil from the K&N filter. I have over oiled mine previously (I know dumb move) and it had oil around that area. Could be why you see oil, but as long as you cleaned the MAF you should be fine. For the idle just perform an idle relearn there is a great video on YouTube.

^ This was my reply

For the idle surging for example going from 500RPM to 650RPM it is normal in these cars with an auto transmission.

 

You're good, but what I mean is that it was also around 650rpm before the throttle cleaning but after it went to 500 to 570rpm but this morning it went back to 650rpm and the throttle body relearned itself again I didn't do anything other than turn it off but it made the sound and what not