I just got back from the dealer and have a couple questions. I first took it in for a "service 4wd" message and they ended up replacing the switch. I also asked them to look at some residue I saw on the turbo tube. They said the air filter was restricted and sucking in oil. This is the 06 filter and it hasn't been on very long 10K maybe. Has anyone else dealt with this yet that has the 06 intake installed? I am not too worried about it but I am a little worried that it might be a regular problem and the the 06 filters are spendy.