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Old 08-19-2014, 01:05 PM   #13
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Default 2015 WRX Used Oil Analysis Thread

Originally Posted by wiUFsh View Post
For now, I will not run with Euro since the viscosity is higher than whats recommended. The Ultra Platinum Euro is a 5W-40 and has a cSt viscosity of 13.2; much higher than a 30 weight. Like I said, I have seen the Ultra Platinum work in a N/A engine so I'm giving it a chance in this new engine. I can't find the UOA that shows that at the moment.

Actually, the 2015 WRX manual also still states that thicker oil is required in hot temps to properly lubricate the engine. 5W-40 is also allowed for replenishment. 13.2 cSt's considered a light 40 grade viscosity and Euro xW-30's are ~12.2 cSt's at 100C. PU 5W-40 typically shears to a 30 grade in severe conditions.


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