I've always had better results with RedLine for the trany and diff. However I don't have any formal proof on that analysis (just personal feeling...).
Ps. I use RoyalPurple in my 370 engine!
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2009 370z, MT & Sport package.
DynoPack (stock): 268.8WHP & 224.4 Torque//K&N filters//Air cabin filter//HPS Tubes//Tune to come when VVEL...
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