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SCZ · 08-08-2019, 05:22 PM

the track prep guide suggests 75W-90 LimitedSlip: GM Part No. 88900401. It doesn't mention the additive. Is the additive necessary?

08-08-2019, 05:22 PM	#15
SCZ Drives: 2015 Z/28 Join Date: May 2019 Location: South Carolina Posts: 23	the track prep guide suggests 75W-90 LimitedSlip: GM Part No. 88900401. It doesn't mention the additive. Is the additive necessary?