[hawk02]

Originally Posted by breakskeet

Lucas Oil differential fluid will be fine. Just buy the additive and add it.

There! Someone told you.

Well, I can tell you from experience heat will break down the slip additive faster when it has to be added in separately versus a differential fluid that has the additive already included.

[AZ_1LE]

Originally Posted by SJFGTO

^^^ Yes. No disrespect to anyone, but why would you use a different oil than the one GM engineers specify?

The OEM fluid in the transmission of my old SS 1LE was swapped out for Amsoil's recommended fluid, and the difference was HUGE, plus transmission temps went down 15 degrees on track. You have to remember that OEM's will always work out a deal with their oil suppliers for a balance between a fluid that will be good for its intended use with what is cheapest.

[DANACO]

Originally Posted by AZ_1LE

The OEM fluid in the transmission of my old SS 1LE was swapped out for Amsoil's recommended fluid, and the difference was HUGE, plus transmission temps went down 15 degrees on track. You have to remember that OEM's will always work out a deal with their oil suppliers for a balance between a fluid that will be good for its intended use with what is cheapest.

“You have to remember that OEM's will always work out a deal with their oil suppliers for a balance between a fluid that will be good for its intended use with what is cheapest.”
__________________
Really ? Do you know this for a fact ?

[breakskeet]

Originally Posted by hawk02

Well, I can tell you from experience heat will break down the slip additive faster when it has to be added in separately versus a differential fluid that has the additive already included.

In 500 miles of track use?

You will be changing gear fluid much faster than the breakdown of the additive will be. RP has the additive in it already. I add more just to be on the safe side.

[kwav8r]

the OEM stuff is synthetic with the Friction Additive already in it, why mess with a good thing?

This "can vs. should" discussion lacks any data pointing to aftermarket fluid being any better than the OEM.

[SJFGTO]

Originally Posted by kwav8r

the OEM stuff is synthetic with the Friction Additive already in it, why mess with a good thing?

This "can vs. should" discussion lacks any data pointing to aftermarket fluid being any better than the OEM.

^^^

[AZ_1LE]

Originally Posted by kwav8r

the OEM stuff is synthetic with the Friction Additive already in it, why mess with a good thing?

This "can vs. should" discussion lacks any data pointing to aftermarket fluid being any better than the OEM.

Might as well run the OEM fluid in the GT4 Spec ZL1 too, right?

[gotswap]

All done, fluid looked like every other brand newgear set @ 1500 miles

[kwav8r]

Originally Posted by AZ_1LE

Might as well run the OEM fluid in the GT4 Spec ZL1 too, right?

Depends. What does the manufacturer recommend?

BTW, what's the maximum velocity of an unladen swallow?

[breakskeet]

Originally Posted by kwav8r

the OEM stuff is synthetic with the Friction Additive already in it, why mess with a good thing?

This "can vs. should" discussion lacks any data pointing to aftermarket fluid being any better than the OEM.

Exactly!

Nor is there any data pointing to aftermarket being worse.

[waterman]

Originally Posted by kwav8r

Depends. What does the manufacturer recommend?

BTW, what's the maximum velocity of an unladen swallow?

African or European swallow?

[sengli]

My local chevy dealer is selling the recommended GM diff fluid for $20 a quart