Which Amsoil ATF for 05 Cadillac 5L50 ?

[Majsmith]

I had the ATF fluid "flushed" at the dealer at 50k...approx 3 yrs ago. I'm fairly certain that they used a bulk dexIII
Fluid. The car now has 85k and I want to go to a quality full synthetic low shear fluid. This vehicles ff was dexIII but
GM has since said to use dexvi fluid. Amsoil lists ATF ( dexiiii) and ATL ( dexvi ) for this vehicle.

Which will provide better longevity, cleanliness , positive shift feel, and transmission protection ?

Or is there another fluid that I should be considering ?

Thanks for all insight.

Mike

 

[901Memphis]

The ATF Amsoil is certainly a fine choice. Also consider Redline D4 and Maxlife Atf.

 

[Trav]

Amsoil ATL is IMHO the best of the best. Make sure to service the filter with GM OEM or USA made Wix.
This an XLR 4.6 HO correct?

 

[Wilhelm_D]

Originally Posted By: Trav
Amsoil ATL is IMHO the best of the best.

Red Line D6 ATF is certainly in the same class.

 

[Trav]

No idea, i never used it. I don't recommend stuff i haven't used for a long time in many vehicles.

 

[Pablo]

You can actually use either. I would tend toward ATF because you live in Alabama (warm). That said ATL is the GM viscosity recommendation.

 

[David1]

Originally Posted By: Majsmith
I had the ATF fluid "flushed" at the dealer at 50k...approx 3 yrs ago. I'm fairly certain that they used a bulk dexIII
Fluid. The car now has 85k and I want to go to a quality full synthetic low shear fluid. This vehicles ff was dexIII but
GM has since said to use dexvi fluid. Amsoil lists ATF ( dexiiii) and ATL ( dexvi ) for this vehicle.

Which will provide better longevity, cleanliness , positive shift feel, and transmission protection ?

Or is there another fluid that I should be considering ?

Thanks for all insight.

Mike


Get the dealer GM ATF...

If yours is still under warranty.. I would go dealer.

Amsoil is good and expensive.. probably cost the same as dealer. Approved for your Caddie

but what year Caddie??? What kid of Transmission?

 

[Wilhelm_D]

Originally Posted By: Trav
No idea, i never used it.

So what you're actually asserting is that you've used Amsoil ATL for a long time in many vehicles and are pleased with it.

 

[Trav]

Originally Posted By: Wilhelm_D
Originally Posted By: Trav
No idea, i never used it.

So what you're actually asserting is that you've used Amsoil ATL for a long time in many vehicles and are pleased with it.

Yes

 

[barkingspider]

If it calls for dex 3, then I would use a dex vi. Brand doesn't matter to me. I also would not have an issue using valvoline syn atf that is dex 3 and dex vi compatible.

 

[Majsmith]

Pablo, is the ATF still fully synthetic ? This is for a 2005 STS. I think the
original dexIII gave the best shift feel so I think I will go with the ATF versus the
Lower viscosity ATL.


Thanks

 

[Pablo]

Originally Posted By: Majsmith
Pablo, is the ATF still fully synthetic ? This is for a 2005 STS. I think the
original dexIII gave the best shift feel so I think I will go with the ATF versus the
Lower viscosity ATL.


Thanks


Yes full synthetic (Grp IV and above) with NO VII's. I absolutely agree with you on sticking with the slightly higher 100°C Vis fluid. Thanks, Paul (use #515729)

 

[Whitewolf]

Use DEXRON-VI is my advice.