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Premium Clean Side Separator ONLY for Ford
Premium Clean Side Separator ONLY for Ford

Premium Clean Side Separator ONLY for Ford

Your Price:
On sale:$49.99
You Save:$100.00(67%)
Part Number:MI1028-6

The Premium Clean Side Separator features a threaded billet cap which disassembles for cleaning and maintenance and is made of Aluminum. The Clean Side Separators are specially designed for use with Oil Catch Cans to trap and remove oil vapors from the clean side of the oil separating system while retaining 100% MAF metered air.
  • Improves Engine Performance
  • Engine Runs Cooler
  • Increases Fuel Efficiency
  • Made of Aluminum

Clean Side Separator

The Clean-side separator solution addresses that small amount of oil vapor that enters the intake air charge upstream of the throttle body during wide open throttle operation when the intake manifold vacuum is not present.

The Clean-side solution allows 100% MAF metered air entry while trapping the oil during wide open throttle operation and allowing it to return back into the valve cover as soon as the throttle is lifted. 

Simply installs as a direct replacement for your stock Oil Fill Cap allowing you to delete and replace the stock OEM hose.


Our plastic and aluminum clean-side separator incorporates an internal coalescing material. The aluminum clean-side separator also allows you to unscrew the top for a quick inspection or cleaning.  Both models are available in Black

This is an add on replacement for your stock Oil Fill Cap. The kit comes with vacuum caps and fittings if needed to connect to your intake air inlet tube.  Although approximately 90-95% of the oil ingestion via the intake air charge enters via the "Dirty" or "foul" side of the PCV system, the other 5-10% enter via backflow through the factory "clean" or "fresh" side tube. This occurs mainly when accelerating or at wide open throttle when intake manifold vacuum drops to zero and crankcase pressure is allowed to build. This pressure will seek the path of least resistance, which is backward flowing into the intake air bridge assembly bringing in oil mist and other contaminants into the intake air charge.  While this will not cause severe issue with a port injection daily driven engine, it will cause detonation and reduced power and fuel economy, and in a performance engine, especially forced induction, this detonation is detrimental to power and the resulting knock retard is a negative tuners and owners should avoid, especially if the engine is run hard for extended periods such as road racing, drag racing, or aggressive driving period.


With a direct injection engine, this contributes to the intake valve coking issues all direct injection engines experience.


The clean side separator is similar to the OEM oil cap in function, retaining an emissions compliant close system, but is superior in several ways. #1, The Premium Clean Side Separator is made of billet 6061 T6 aircraft grade aluminum and is recommended over the plastic one in cold environments that may break if used in sub-freezing temperatures. (the aluminum model can safely be used in all temperatures). Both models contain stainless steel coalescing media in the separation chamber to trap and retain the oil for the periods of low or no intake manifold vacuum VS the OEM unit being a simple empty chamber. This allows most of the oil to be trapped VS a smaller percentage, and also returns it to the valve cover as soon as vacuum returns during deceleration, idle, or cruise.

5 Stars
Worked great. They were able to fabricate one for my 2018 GMC Sierra.
Did you find this helpful?  2 of 3 Found Helpful
Reviewed by:  from Picayune. on 9/26/2019
5 Stars
Great product and easy install. Fits easily into oil cap base piece with no issues.
Did you find this helpful?  2 of 4 Found Helpful
Reviewed by:  from Milwaukee WI. on 10/24/2018