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Well your block we don’t know the specs is it n/a or turbo standard or heavy modded. 5w30 is a good balance. If your heavy racing then that’s different you could go to the castrol slx professional racing oil 5-40. I have never used the redline break in oil additive. Celek would be a good person to ask as he is the master engine builder. As for brand royal purple has a good physical protection, redline is also good although I have never used it. I use to use mobile 1 in my subies. Motul is good to, brand is up to you it’s all preference. I’ve heard that Enoes also makes good stuff. I would highly sudjest an oil cooler reguardless this is very important.
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