What diff fluid for a 2024 Z PERFORMANCE (LSD)?

[5amp5on]

This is a serious question and not a criticism of anyone in this thread or the maintenance you guys are doing.

What can happen not doing anything with your differential fluid?

I have never, ever touched the differential on any car, nor have I ever paid a shop to do anything with the differential fluid.

As many of you have heard from me before, I have a 1993 Miata with over 200k miles and a 2002 Ford Explorer with over 300k miles. Both owned since new. I have ran several vehicles over 200k in my life of car ownership.

I have never had a differential issue, and I've never touched the fluid.

Why are we doing this maintenance? Is it specific for sports cars? The only high performance car I've ever had before the Z is a 1998 Z28 6 speed manual which I also never touched the differential. I sold that with about 68,000 miles on it after buying it new.

 

[zeroptzero]

Good idea on switching over to a quality synthetic. I currently have Amsoil in my Grand Cherokee differentials. Redline in the Wrangler & Z.

Differentials take a long time to warm up which is one of the advantages of a thinner OEM-spec fluid, and why I prefer to run OEM-spec on street cars. Both my Jeeps stood up to the TX summer heat when we lived in Dallas & Houston running 75W-85. The Wrangler sees off-road duty and both tow.

Both Redline & Amsoil offer a 75W-85 GL-5 gear oil. Switching to a synthetic alone is already a huge upgrade vs. the conventional stock crap irregardless of weight.

Thanks, I know from some of my past fluid analysis testing (on other cars) that differential wear is directly related to viscosity, I don't want to go too high but a good synthetic in the general range of 75w90 should be safe, 75w85 is still an option I can explore as you said, going with synthetic alone is a plus. Thanks for the reply