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Which engine oil for a 400+bhp STI EJ207

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Old 11 May 2023, 01:50 PM
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Timur 008
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Default Which engine oil for a 400+bhp STI EJ207
Been using Millers 5w30 fully synthetic religiously and now running over 400bhp would anyone recommend a different type or brand? Do notice the oil temp levels hover around 100°degC when pushed a bit.
Ps. I have a FMIC but no uprated oil cooler.
Thanks for any replies from now 👍
Last edited by Timur 008; 11 May 2023 at 02:02 PM. Reason: Added upgrades
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Old 11 May 2023, 02:07 PM
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fpan
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100C is nothing, I used to see 100C in my FSTi that was running 320bhp or so.
I'd speak to the mapper but personally I'd use 10w-40 in a standard car or 10w-50 in a modified car, especially if you do trackdays.
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Old 11 May 2023, 02:23 PM
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Timur 008
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Originally Posted by Timur 008
Been using Millers 5w30 fully synthetic religiously and now running over 400bhp would anyone recommend a different type or brand? Do notice the oil temp levels hover around 100°degC when pushed a bit.
Ps. I have a FMIC but no uprated oil cooler.
Thanks for any replies from now 👍
Also oil pressure goes too low for my liking once heated
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Old 11 May 2023, 03:44 PM
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stockcar
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5w30 is too light regardless, personally would be using 10w50 or similar......
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Old 11 May 2023, 05:34 PM
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Timur 008
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Originally Posted by stockcar
5w30 is too light regardless, personally would be using 10w50 or similar......
would this grade keep oil pressure high even when heated as once its heated it goes low with 5w-30
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Old 11 May 2023, 06:05 PM
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1509joe
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Originally Posted by Timur 008
would this grade keep oil pressure high even when heated as once its heated it goes low with 5w-30

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Old 13 May 2023, 08:35 AM
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i use millers 10w 50 nanodrive for my forged
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