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Old 02-17-2017, 12:43 PM   #10
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Drives: 15 Z/28 #934
Join Date: Sep 2016
Location: S. Cal
Posts: 469
Originally Posted by Stock Boy View Post
Another vote for Castrol SRF. I've boiled RBF600 numerous times, but I haven't tried 660. No issues with SRF though.
+2 = run SRF for many years in many different track cars and never had a single issue. It is expensive, but it works.
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