After market Air filters

Hi all, here is some info from General Motors

The installation of an aftermarket reusable, oiled air filter may result in:
Service Engine Soon (SES) Light On
Transmission shift concerns, slipping and damaged clutch(es) or band(s)
Engine driveability concerns, poor acceleration from a stop, limited engine RPM range
The oil that is used on these air filter elements may be transferred onto the Mass Air Flow (MAF) sensor causing contamination of the sensor. As a result, the Grams per Second (GPS) signal from the MAF may be low and any or all of the concerns listed above may occur.

When servicing a vehicle with any of these concerns, be sure to check for the presence of an aftermarket reusable, excessively oiled air filter. The MAF, GPS reading should be compared to a like vehicle with a OEM air box and filter under the same driving conditions to verify the concern.

Transmission or engine driveability concerns that are the result of the installation of an aftermarket reusable, excessively oiled air filter are not considered to be warrantable repair items.


Whats it mean? Take out your K&N filter before going to the dealer, or better yet just clean the Mass air flow sensor yourself, just use spray type brake and parts cleaner.

I think the important bit is "excessively oiled". I've seen the result of an excessively oiled K&N filter - a film of a gritty black substance across the MAF, coating the inside of the MAF pipe and TB, and some problems with pinging. I found this on my own car... after the MAF fell off the Airbox... a week after a dealer mechanic ineptly re-oiled my filter.

>:(

The problem is how will your dealer define excessively oiled? Any after market filter if you are making a warrantee claim? Adds uncertainty.

yet another reason to ditch the MAF :P

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Originally Posted by Chris@HPTuners

yet another reason to ditch the MAF :P

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Now I'll buy that! Anyone have a binary for a stock 03 C5 LS1 without a MAF sensor in the equation?

This only applies to excessively oiled K&N filters. The oil used in the Holley Powershot filters is MAF safe. Even so, you shouldn't over-oil it, but if you do, it won't kill your MAF.

And yes, you *can* use Holley oil on a K&N filter. It will just be blue instead of red.

What makes an oil "MAF safe"?

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Originally Posted by jimmyblue

What makes an oil "MAF safe"?

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Beats me. ??? I'm just going by what K&N and Holley tell us.

I bet it's ultra-sticky and not prone to get sucked off the media...

I've been considering using my dirt bike filter stuff on my cotton-gauze filter. The dirt bike stuff is like liquid crazy glue. Put some on your hands, rub them together, and you can pull 5' spider webs between your hands. It's nasty. The only stuff that can take it off is a the releasing agent made for it, or gasoline (or maybe a few other 'not recommended' solvents).