Rear / Differential Lubrication??

[Glennm27]

What 75W-90 lube do you guys prefer in the C5 Differential?

I just drained my 3.42 rear and am debating Amsoil, Redline, Mobil 1 or GM.

Any suggestions?

I do have the 4 oz bottle of GM Limited Slip additive ready to go in.

 

[DDLS3]

Amsoil in mine, mainly due to the fact that it is stocked at the local NAPA. I'll be interested to hear other thoughts as well.

 

[vettenuts]

I too am running Amsoil. Careful of the GM additive. Some like Amsoil S2000 (currently being updated with SVR I think) and Redline do not require an additive. GM's additive isn't compatible with Redline either since its a different base. I have had good luck with the Amsoil, but some have reported the need to put in more additive than comes with the product straight from the bottle.

 

[Jim M]

I've used both Mobil1 and the GM synthetic with no problems at all. With either of these, use the limited slip additive. I don't have any experience with the other brands, but I'm sure they are also good products. The GM lube is more expensive than Mobil 1.

 

[ErnieN85]

I have used Mobile one and Redline currently use Redline as it's base stock is (supposed to be) Better