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We tracked on the Motul 8100 5w30 X-cess last season in hot/humid NE Summers without the oil cooler and had no issues daily/track use over the course of 4-5K interval changes. We moved up to the 300v 5w30 and the test have come back essentially the same as the 8100. Then we moved up to the oil cooler (Perrin) and results from Blackstone are great. We generally will alternate between the 8100 and the 300v just to keep the detergents in there.
-mike
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