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Subaru WRX Oil Cooler Kit 2015+

  1. Mishimoto 2015 Subaru WRX Thermostatic Oil Cooler Kit, Part 3: Testing Results

    Mishimoto 2015 Subaru WRX Thermostatic Oil Cooler Kit, Part 3: Testing Results

    Interested in purchasing our thermostatic WRX oil cooler? Check out our product page for more information!

    Mishimoto Subaru WRX Oil Cooler Kit

    It was now time to test our components and ensure that they were operating to our standards. Our previous testing showed that oil warmup was rapid enough for use on a daily driven vehicle. Next we had to confirm that temperature improvements compared to the stock cooler setup were efficient.

    We used a similar testing practice with the previous version of this kit, which includes the procedures and conditions listed below.

    Testing Conditions

    • Ambient Temperatures: 70°F-75°F
    • Driving Conditions: 6 miles of highway driving at 60 mph
    • Sensors: PLX temperature sensor reading 10 times per second

    Setups Tested

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  2. Mishimoto 2015 Subaru WRX Thermostatic Oil Cooler Kit, Part 2: Product Development

    Mishimoto 2015 Subaru WRX Thermostatic Oil Cooler Kit, Part 2: Product Development

    Interested in purchasing our thermostatic WRX oil cooler? Check out our product page for more information!

    Mishimoto Subaru WRX Oil Cooler Kit

    Our direction with this project is to develop a thermostatic oil cooler solution for the 2015 WRX. Our team decided to eliminate the factory liquid-to-liquid cooler and replace it with one of our thermostatic sandwich plates. By doing so, we could properly regulate fluid temperatures according to the temperature thermostat installed in our sandwich plate. Additionally, we could provide improved cooling efficiency with the use of our liquid-to-air heat exchanger carried over from our non-thermostatic kit.

    So why not retain the stock cooler and make the Mishimoto unit thermostatic? We have a few reasons to back up this decision. First is clearance concerns. When adding a sandwich plate to the top of the factory cooler, the filter is raised as well. This provides a

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  3. Mishimoto 2015 Subaru WRX Thermostatic Oil Cooler Kit, Part 1: Product Introduction and Reasoning

    Mishimoto 2015 Subaru WRX Thermostatic Oil Cooler Kit, Part 1: Product Introduction and Reasoning

    Interested in purchasing our thermostatic WRX oil cooler? Check out our product page for more information!

    Mishimoto Subaru WRX Oil Cooler Kit

    After releasing our most recent direct-fit oil cooler kit for the 2015 Subaru WRX, questions from our fan base and online communities began to fill our inboxes. Our kit included all necessary components for installation and placed a large 19-row oil cooler in the front grille area. We saw huge gains in cooling performance for this particular setup, with decreases of over 25°F. This project was extremely successful and we anticipated that our customers would be very pleased with the performance. The primary concern with a portion of enthusiasts was low fluid temperatures. This kit was designed with a vehicle-specific oil sandwich plate that sat on top of the factory oil cooler/warmer.

    This was a truly unique design, however the one feature this component lacked was an

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