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Lubricants/fluids Survey

BlackThunder

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BlackThunder Enthusiast

BlackThunder

Posted
Posted

I'm thinking of changing out all of my fluids in the truck and I'm hoping some people could share what brand and type of fluids/oils you use. I have the Autotrac system on my truck.

 

Transmission:

 

Transfer Case: (heard GM AutoTrak II is the only way to go)

 

Front Differential:

 

Rear Differential:

 

Engine Oil:

 

I'm not looking long winded studies or anything. Just curious what people are using.

Bish Senior Enthusiast

Bish

Posted
Posted
I'm thinking of changing out all of my fluids in the truck and I'm hoping some people could share what brand and type of fluids/oils you use. I have the Autotrac system on my truck.

 

Transmission:

 

Transfer Case: (heard GM AutoTrak II is the only way to go)

 

Front Differential:

 

Rear Differential:

 

Engine Oil:

 

I'm not looking long winded studies or anything. Just curious what people are using.

 

Trans - Dexron VI

T-Case - Dexron VI (Spec for my t-case (AWD) instead of Autotrak)

Front/Rear Diff - Amsoil

Engine - Amsoil

Z45 Senior Enthusiast

Z45

Posted
Posted

Transmission:

Amsoil ATF Dexron VI

 

Transfer Case: (heard GM AutoTrak II is the only way to go)

Amsoil ATF Dexron VI (note-07 NBS up use ATF, 99-07 Classic can only use AutoTrac fuid

Front Differential:

Amsoil Severe Gear 75W-90

Rear Differential:

Amsoil Severe Gear 75W-90

 

Engine Oil:

Amsoil SSO 0W-30

 

Miles on vehicle 12,000+

Miles using Amsoil 11,000+

dlstewart01 Senior Enthusiast

dlstewart01

Posted
Posted

Engine---Castrol Syntec European formula made in germany 0W30 group IV PAO synthetic, can only be purchased at Autozone.

 

Trans---- Dextron VI

 

Diff------ Castrol Syntec 75W-90

 

Chassis grease- Mobil1 synthetic

 

Brake fluid- Castrol GT LMA Dot-4

 

Radiator- Dexcool

 

Gas------ Shell

 

Me------- A hot cup of joe every morning

 

Have a good one, :cheers:

 

Don

slomo007 Enthusiast

slomo007

Posted
Posted
The german made Caatrol Syntec 0W30 is a kick arse oil!

 

I'm using it too, have been since 8k miles. No problems so far, but not that I was expecting any problems...lol.

 

Just recently changed my rear diff fluid to Royal Purple also. Haven't changed the tranny fluid yet but I may do that in the Spring, and install a tranny cooler at the same time.

stadt11 Senior Enthusiast

stadt11

Posted
Posted
Transmission:

Amsoil ATF Dexron VI

Did you do a complete flush or just drop the pan to change the fluid/filter/gasket?

BlackThunder Enthusiast

BlackThunder

Posted
  • Author
Posted

Thank you for all the replies folks. The plan right now is to go with Mobil 1 for engine oil (they didn't have any GC 0W30 in stock), and Royal Purple for the front/rear diffs, Royal Purple for the tranny, and Autotrak II for the transfer case.

Z45 Senior Enthusiast

Z45

Posted
Posted
Did you do a complete flush or just drop the pan to change the fluid/filter/gasket?

 

Complete flush using purge method, drop pan and inspect (no debris found in pan), keep oem filter (only 1,000 miles on new vehicle), fill pan and then disconnect cooler lines and run 16 qt thru to make sure all of the oem ATF was gone. All work done by ASE trans pro's with my supplied lubes. Had them do both axles at the same time. I have used this shop for many years and they are experts doing this, took about 1-1/2 hrs at $50hr labor. I send them about 1-2 customers a month. No machines in use at this shop, mention one and they say a silent prayer because they are the shop who fixes all the trans mistakes the local quick lubes create with the flush machine. He jokingly told me he would have to lay off 1 person if they stopped using the flush machines.

LAGA Enthusiast

LAGA

Posted
Posted
Thank you for all the replies folks. The plan right now is to go with Mobil 1 for engine oil (they didn't have any GC 0W30 in stock), and Royal Purple for the front/rear diffs, Royal Purple for the tranny, and Autotrak II for the transfer case.

 

The GC 0w-30 is only available at Autozone. I have used it and it is great stuff. Since then I have moved on to Amsoil

ColoradoSkiCountry Senior Enthusiast

ColoradoSkiCountry

Posted
Posted

Transmission: Whatever came from the factory (I do not do any heavy duty towing)

 

Transfer Case: Whatever came from the factory

 

Front Differential: Whatever came from the factory

 

Rear Differential: Whatever came from the factory

 

Engine Oil: Used whatever oil the GMC dealership used for the first 10,000 miles, then switched to Mobil-1 5W30 Full Synthetic with an AC/Delco oil filter. I change the oil every 5000 miles, which is usually every 6 months for me.

 

Fuel: 85 Octane, Any major brand. Usually Conoco, Phillips 66, or Chevron (when in a state that has Chevron)

 

Blinker Fluid: Amsoil

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