If it is an engine air filter and the media is oiled, wouldn't a very small amount of the oil get into the intake air stream and an even smaller amount onto the MAF. And aren't MAF very very sensitive to even very small amounts of contamination to the extent that they may not work properly and throw a code if even a very small amount of contamination gets on them.
I am not 100% sure that this problem will occur, but if it were mine, I would opt for a filter that did not have a oiled media.
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Is there anyone out there who has used these for many miles without it causing a problem?