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Mobil 1 Delvac ATF for 6L80?

FishNJ

By FishNJ
in Engines & Drivetrain

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FishNJ Enthusiast

FishNJ

Posted
Posted

searched around and didnt see anything on this, forgive me if its been asked. 

 

Anyone running the Delvac ATF in a 6L80? 

While not explicity Dex VI spec, the viscosities seem pretty comparable to Dexron VI (lower at lower temps, and 1 unit higher at high temps), and in Alisons seems GM approves Dex VI for newer units while Alison requires the TES-295 spec, leads me to believe they are nearly interchangeable. 

of everything I have read, no complaints on Delvac, and  one of the best ATFs out there from a service perspective. 

i have read of folks running it in the 4L60 and a others in every trans they own with only positive things to say... 

 

 

thanks

 

Property Mobil
Delvac 1 ATF 		AMSOIL ATL
Fuel Efficient  		Valvoline
Dexron VI ATF 		AC Delco
Dexron VI ATF 		Valvoline
Maxlife ATF
Brookfield Viscosity @ -40 C, cP 8400 7676 12500 11500 9000
Kinematic Viscosity @ 40 C, cSt 39 30.8 29.5 29.5 28
Kinematic Viscosity @ 100 C, cSt 7.3 6.3 6.0 5.8 5.9
Viscosity Index 168 159 155 145 163

 

newdude Senior Enthusiast

newdude

Posted
Posted (edited)
21 minutes ago, FishNJ said:

searched around and didnt see anything on this, forgive me if its been asked. 

 

Anyone running the Delvac ATF in a 6L80? 

While not explicity Dex VI spec, the viscosities seem pretty comparable to Dexron VI (lower at lower temps, and 1 unit higher at high temps), and in Alisons seems GM approves Dex VI for newer units while Alison requires the TES-295 spec, leads me to believe they are nearly interchangeable. 

of everything I have read, no complaints on Delvac, and  one of the best ATFs out there from a service perspective. 

i have read of folks running it in the 4L60 and a others in every trans they own with only positive things to say... 

 

 

thanks

 

Property Mobil
Delvac 1 ATF 		AMSOIL ATL
Fuel Efficient  		Valvoline
Dexron VI ATF 		AC Delco
Dexron VI ATF 		Valvoline
Maxlife ATF
Brookfield Viscosity @ -40 C, cP 8400 7676 12500 11500 9000
Kinematic Viscosity @ 40 C, cSt 39 30.8 29.5 29.5 28
Kinematic Viscosity @ 100 C, cSt 7.3 6.3 6.0 5.8 5.9
Viscosity Index 168 159 155 145 163

 

 

 

No.  Dexron 6 on 6L80.  If you had a 4L60 that was still on Dexron III you could run this Delvac ATF.  

 

The Mobil Delvac ATF is a Dexron III fluid, which is why it is also an Allison TES 295 spec fluid.  Dexron III = TES 295 Allison.  Allison made changes to seal materials to support GM's use of Dexron 6 in the 2007-2010 timeframe if I recall. 

 

TLDR.  WIll NOT interchange.  Dump anything in your truck that is a Dexron 6 fluid.  

Edited by newdude
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Grumpy Bear Senior Enthusiast

Grumpy Bear

Posted
Posted

Dexron VI is the correct fluid for the 6L80/90E transmission. 

Mobil Delvac 1 ATF is not that fluid.

Hence no. 

That clear enough?  

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