The 660 has a bit higher boiling point but draws moisture a bit faster also. I go with the 600 unless its for an application, like racing, that requires more frequent changing of the fluid.
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2011 370Z 6MT Sport Gun Metallic | ARC | CJM | Ecutek | FI | Fujimura | R2C | SPL | Stillen | TWM | Z1 | ZSpeed |
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