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How often to change Air Filters?
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Author:  Eatkinson [ Sat Nov 19, 2011 6:31 pm ]
Post subject:  How often to change Air Filters?
How often are we supposed to be changing our air filters? I'm asking because I'm delving into buying good quality oil filters in bulk, and realized I could do the same thing for air filters, then I realized I wasn't sure exactly how often they're supposed to be changed. How can I tell?

I have a crappy Fram air filter on my 1960 Valiant (don't ask, I didn't choose it) that was changed sometime around 6 years ago when I had the car revived, but now it's full of junk and needs a change (I don't drive the car often and hadn't noticed how dirty it was until now).

So how often is a good rule of thumb for our cars? I live in LA: the air is dirty here! My 63 Dart is driven way more frequently, and probably subjected to 'Severe" driving conditions, even though I do get it out on the freeway often enough.
Author:  DusterIdiot [ Sat Nov 19, 2011 6:35 pm ]
Post subject:  Used to be...
It used to be the rule of thumb that if you couldn't see daylight through the pleats when you held it up to the sunny sky, it was time to toss it...I tend to change mine before it gets to that point, roughly about 30% dirty so it doesn't mess with my A/F ratio on the Hpak car (it's that sensitive...).

-D.Idiot
Author:  supton [ Sat Nov 19, 2011 7:05 pm ]
Post subject: 
I remember that daylight rule too. Seems to me though that it's cheap enough to just replace once/year on a daily driver. If you're really curious, you could hook up a vacuum gauge to a port above the throttle plate, and replace the element when you get above say 1psi drop, or similar.
Author:  exoJjL [ Sat Nov 19, 2011 8:12 pm ]
Post subject: 
I seem to recall hearing that you should change the air filter every other oil change. I generally go by the daylight rule though.
Author:  Eatkinson [ Sat Nov 19, 2011 8:32 pm ]
Post subject: 
Thanks guys. I'll employ the daylight rule then.
Author:  Eric W [ Sun Nov 20, 2011 6:09 am ]
Post subject: 
Every 6 months on a daily driver, needed or not. But thats just me. :wink:
Author:  exoJjL [ Sun Nov 20, 2011 3:08 pm ]
Post subject: 
Quote:
Every 6 months on a daily driver, needed or not. But thats just me. :wink:
Yup which is basically the same as "every other oil change." 8) :wink:
Author:  Reed [ Sun Nov 20, 2011 3:15 pm ]
Post subject: 
Whenever I remember to. I know that is bad, though. This reminds me, I should probably change the air filters on my cars now.
Author:  ceej [ Sun Nov 20, 2011 4:36 pm ]
Post subject: 
Every other Wednesday during plowing season. :roll:
And,
The first sunny day of spring. :D

:lol:

CJ
Author:  emsvitil [ Sun Nov 20, 2011 4:37 pm ]
Post subject: 
Just before a smog test.......
Author:  emsvitil [ Sun Nov 20, 2011 4:39 pm ]
Post subject: 
Has anyone else noticed that the EFI type panel filters seem to last longer than the round carb type filters?
Author:  Reed [ Sun Nov 20, 2011 7:12 pm ]
Post subject: 
No, not really.
Author:  Danarchy [ Sun Nov 20, 2011 7:15 pm ]
Post subject: 
Quote:
How often to change Air Filters?
:shock:

"Before it gets too dirty." (Daylight Test)
Author:  Guido [ Sun Nov 20, 2011 7:16 pm ]
Post subject: 
Quote:
Has anyone else noticed that the EFI type panel filters seem to last longer than the round carb type filters?
Absolutely. More surface area.

Guido
Author:  FrankRaso [ Tue Nov 22, 2011 6:09 am ]
Post subject: 
Quote:
Has anyone else noticed that the EFI type panel filters seem to last longer than the round carb type filters?
The owner's manual in my 03 Impala recommends that the panel air filter be inspected every 25,000 km (15,000 miles) and replaced every 50,000 km (30,000 miles).

In comparison, my 1965 owner's and service manuals recommend inspection & cleaning every 6 months and replacement every 2 years.
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