okay dropped my 07 mustang off at dealership(yesterday) for possible cam phaser replacement and timing chain tensioner replacement due to some slight knock (hardly can hear it) and some swishing noises at idle. i called the dealership today and they told me that nothing appears to be wrong and everything checks out normal, timing is correct, cam phasers or okay, etc. ford tsb i guess told them that i shouldnt be running a fram oil filter due to it not being the right one to use cause ford uses a specialy vented oil filter. does this sound right to you guys. they said it was something new..they also said to drive if for a month and if the sound reoccurs then to bring it back in and theyll do a major teardown. i talked to the guy who writes down the info when you first drive up to the service dept. and he was relaying info that the mechanic was telling him.