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    Oil / Air Separator System, SLS


    Availability: In stock


    Oil / Air Separator System, SLS

    Weistec's Oil / Air Separator system is a must have for completely stock vehicles, to those upgraded with the Weistec Supercharger. The separator system vastly decreases oil retention by the engine, reduces detonation (Knock), and can ultimately save the life of the engine internals.

    As the excess crankcase pressure is vented through the PCV valve and into the intake manifold the engine will eventually draw in, not only air which is wanted, but also particles of aerated oil which creates instability in power due to the low octane level of oil.

    *Product may not be emissions compliant.  Check local laws prior to installation.

    Key Features:

    • Eliminates the anti octane properties of oil

    • CNC machined 6061 aluminum

    • Hard anodized to military spec

    • Direct bolt in for M156/M159 vehicles

    • Utilizes brass filter elements

    • 100% serviceable

    • Flexible and reversible mounting and installation

    The Weistec Oil/Air Separator System comes equipped with billet PCV adapter fittings for easy bolt on performance, and accumulates oil in the lower body which can be drained and recycled during every oil change*

    *Some vehicles may have more oil consumption or "blow-by" than others. If you are unsure whether your vehicle may or may not be one of these, check the oil separator every 3,000miles (5,000Km) to ensure the separator system is not filled.

    PDF Filem156oas_4 (799.5 KB)Download


    This policy only applies to installers and/or users who are in the United States, customers who reside in other countries should act in accordance with their local laws and regulations.
    Some Weistec Engineering performance upgrades may solely be used on vehicles in sanctioned competition which may never be used upon a public road or highway, unless permitted by specific regulatory exemptions (such as a CARB E.O.). For state specific details please visit the following website.
    It is the responsibility of the installer and/or user of the product to ensure that it is used in compliance with all applicable laws and regulations. If a product was purchased in error, do not install and/or use it. The purchaser must arrange to return the product(s) for a full refund.
    All performance modifications and installations are at the customer’s own risk. Weistec Engineering holds no responsibility either implied or otherwise for mechanical, electrical or other failure when using any aftermarket performance products.


    WARNING: Cancer and Reproductive Harm