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The 300v actually has been showing having plenty of additive left even after 2500 track and 2500 street miles in our Project BRZ using Blackstone Labs testing.
I'm not a fan of using the Motul "Eco" anything. They are setup for milage not wear protection. For a daily driver and track car I suggest the 8100 "X" series (X-clean, X-cess) even if you have to move to a 5w30 (0w20 doesn't come in X).
-mike
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