Which / What Viscosity / Engine OIL type? Do you guys use, results, feedback?

[Voodoo_ChildR32]

What was you comp? I have 170 across and it feels strong but I havent tried anything else yet. Maybe I'll try something slightly thicker in the cold range.

Haven't done a comp test yet, I also believe that I may have a bad valve seal or two. I'm planning on rebuilding the head soon with Tomei internals and poncams. I just found that 5w30 was a little too thin especially for a boosted application. The 10w30 just felt like it made a noticeable difference in the way my engine runs.


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[MarusGTR]

Haven't done a comp test yet, I also believe that I may have a bad valve seal or two. I'm planning on rebuilding the head soon with Tomei internals and poncams. I just found that 5w30 was a little too thin especially for a boosted application. The 10w30 just felt like it made a noticeable difference in the way my engine runs.


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Well TSM calls for 7.5w30 and at running temps 5 and 10w30 should be the same SAE standard viscosity (IIRC though 5w breaks down easier at higher temps)