Hey Steve...
I bought one of the Grimmspeed AOS to go on my rebuild so I never have to deal with oil in the PCV/intake again.
That oil sounds very heavy, even for break-in. if you are still in break-in, I'd use Valvoline 5-30 Dino oil, possibly with the Custom Cams additive"
How noisy are the pistons at cold startup? Do you know what P-W clearance your builder used? <=> .0025"
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