[DangerZL1]

Originally Posted by ZO6 Bryan

The Mobil 1 LS 75W-90 gear oil does have the additive already. I looked at that one too.

http://www.mobiloil.com/USA-English/..._75W-90LS.aspx

Mobil 1 Synthetic Gear Lube LS 75W-90 does not have enough LS additive to meet GM spec #88862624. This is why I went back wit the GM fluid. I didn't want to use more additive, nor add more than necessary. I think Valvolines synthetic gear lube meets this spec.