Quote:
Originally Posted by nikitopo
I don't want to say definitely that your engine oil selection caused the issue, but for spiritual driving and driving sometimes like maniac the 0w20 oil was not the best choice. This was suggested by factory just to keep fuel consumption and emissions low. You should have used instead a 0w30 or a 5w30 oil. STI suggests even a 5w40 oil for mixed applications of street driving and circuit driving.
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I totally agree, Subaru suggests 0W20 for various reasons but sells 5W40 oil for hard use!
If you read the following thread you'll clearly see that after some spirited driving the car at idle has not acceptable oil pressure so a thicker oil is absolutely necessary, bear in mind in this test the 0W20 is V300 one of the best oils in it's class!
https://www.ft86club.com/forums/showthread.php?t=91820