Rendering of Mishimoto oil cooler assembly

2015+ Subaru WRX Direct-Fit Oil Cooler Kit, Part 2: Product Testing and Completion

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

Mishimoto Subaru WRX Oil Cooler Kit

WRX Oil Cooler

With our finalized prototypes in hand, it was time for some testing! We needed to perform a back-to-back comparison of the stock oil cooler and the Mishimoto oil cooler. First, check out a few shots of our CNC-machined sandwich plate!

3D printed prototype (left) and final prototype of sandwich plate
3D printed prototype (left) and final prototype of sandwich plate
3D printed prototype (left) and final prototype of sandwich plate
3D printed prototype (left) and final prototype of sandwich plate

Let’s see how this guy looks installed!

Mishimoto prototype of oil sandwich plate installed
Mishimoto prototype of oil sandwich plate installed

Throw on a few banjo fittings!

Mishimoto prototype of oil sandwich plate installed with banjo fittings
Mishimoto prototype of oil sandwich plate installed with banjo fittings
Mishimoto prototype of oil sandwich plate installed with banjo fittings
Mishimoto prototype of oil sandwich plate installed with banjo fittings

And then we attach and route our lines.

Mishimoto prototype of oil sandwich plate fully installed
Mishimoto prototype of oil sandwich plate fully installed
Mishimoto prototype of oil sandwich plate fully installed
Mishimoto prototype of oil sandwich plate fully installed

Here’s a shot of the rendering of the assembled kit. These Solidworks software renderings are always neat!

Rendering of Mishimoto oil cooler assembly
Rendering of Mishimoto oil cooler assembly

Testing time! We spliced our temperature sensors into the lines and hit the road for some testing. Our testing conditions are listed below.

  • 79°F–80°F with 62% humidity
  • 65 mph cruise for approximately 8 miles
  • Identical tests on the same day conducted for both the stock setup and the Mishimoto oil cooler
  • Special care was taken to ensure a smooth path of airflow in front of the vehicle during testing.

Check out the sensors!

Temperature/pressure sensors installed
Temperature/pressure sensors installed

And the results are in! Check out our temperature and pressure charts below.

Temp Data

Pressure Data

The addition of the Mishimoto oil cooler provided a 25°F drop in oil temperatures during normal driving conditions while lowering oil pressure by only 5 psi. Our engineering team predicts that even greater differences between the stock setup and the Mishimoto unit will be evident during track/aggressive driving and with higher-powered vehicles.

With successful results and our goals accomplished, we were able to close this project and put another successful oil cooler into production.

Thanks for following along, and feel free to follow-up with any comments or questions!

Keep an eye on our Engineering Blog for updates on more of the projects we are working on for the 2015 WRX!

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

Mishimoto Subaru WRX Oil Cooler Kit

2 thoughts on “2015+ Subaru WRX Direct-Fit Oil Cooler Kit, Part 2: Product Testing and Completion”

  1. Pingback: Terry Robinson

Leave a Reply

Your email address will not be published. Required fields are marked *