2015+ Subaru WRX Direct-Fit Oil Cooler Kit, Part 2: Product Testing and Completion
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Mishimoto Subaru WRX Oil Cooler Kit
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!
Let’s see how this guy looks installed!
Throw on a few banjo fittings!
And then we attach and route our lines.
Here’s a shot of the rendering of the assembled kit. These Solidworks software renderings are always neat!
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!
And the results are in! Check out our temperature and pressure charts below.
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!