A lot of problems with oiled filters in the past was because those vehicles were also running MAF equipment. It was not uncommon for someone to "over-oil" the element which would end up on the MAF hotwire and eventually cause problems. While most of those type of hotwire systems are engineered to have a burn-off to clear deposits,over time there are consequences since you can't possibly burn off all the carbon.
Now the ST has a speed density system, which is less touchy, but ask yourself if you really want to introduce more oil into the intake? A better question would be how much better IS filtering with an oiled element? Does the oiled filter actually have a lower pressure drop? The actual answer is you don't know....and neither do I. So I would stay with the dry filter. IMHO.
I always questioned this logic, simply because your motor by default allows oil to enter the intake system via the PCV system. Yes, not all sensors are impacted by this, but there are several that are.
Although we don’t have the “hard data”, there is very little chance of real impact. Only example I have is my 3.5 eco in my truck. I flow 56.5#/min at 21 psi. I have three different intakes for the truck. OEM, AFE and Full Race. OEM I use the AEM drop in(dry), AFE with oiled Pro-Guard 7’s and the Full Race with their dry filters. The OEM hinders airflow by a consistent 1.8#/min, but there is no difference between the FR or AFE intakes.
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