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gauging interest: JDM Sti V8 complete twin scroll setup

ok im looking and people are using mt-90 redline on the reg. wrxs and its not gl-5 cert just gl-4. others have ranted and raved about motul gear oil and its gl-5. but people love the redline also. i just want to go the safe route
 

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Do a search, this has been discussed in a couple other threads recently. The safe route is to stick with the OEM gear oil. If you want to try synthetic, feel free. Keep us informed, and post a long-term update.
 
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