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Old 08-19-2014, 02:24 PM   #14
Scooby Newbie
Member#: 394877
Join Date: Jun 2014
Location: Austin
2015 WRX Limited


Originally Posted by bluesubie View Post
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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I thought it said that 5w-40 was ok for topping off, but to replace it with 5w-30 at the next oil change.
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