What brand of fluids?

[sealandsky]

What brand fluids are you all using for you trucks?

1. Oil
2. Transmission Fluid
3. Front diff
4. Rear diff
5. Transfer case

I usually use Mobil 1 in my other vehicles. I just got this 2019 Yukon and I was going to change the oil. I see that you need to use Dexos 1 approved oil. I saw the other day at Farm and Fleet that Peak oil was Dexos approved.

Just wondering what you all use.

TIA

Engine: Mobile 1 0-20W all day long. GM fluids everywhere else.

 

[BlackYukon]

 

[Tiredmechanic23]

I’m in the process of doing all the changes now too.

Went with Valvoline synthetic across the board.

I use valvoline synthetic for the engine but thats about it. I use Mobile 1 for the trans because of the TSB and I found its cheaper by the large case. I use Delco for the rear end.

I have always used valvoline on every vehicle with 0 issues. Only car I used something else on was my RX-7 I used Castrol GTX 20w-50 in it.

 

[mb1500]

Highest quality fluid that I can afford to change at a proper interval that meets certifications set fourth by the vehicle MFR at the specified viscosity. Brand is irrelevant to me.

 

[Tahoe14]

Good luck with this post. You will be more confused than when you started with all the different opinions. Just use good quality fluids and you should be fine.

 

[ThisIsLivin]

Amsoil. I have 360,000 on my 03 Suburban and a compression check is still like new. I have beat that thing to death and it runs better than new and is the smoothest idling vehicle I own. I run Amsoil in everything from my 700hp offshore to my 38 year old lawnmower with the original sparkplug. I drive a ton and have driven over a million miles in 5 different vehicles. I put a catch can on my 15 Denalli and I get almost no condensate because the oil isn't separating. My hot idle oil pressure doesn't change from old oil to new when I do an oil change at 10k miles. When you look at the lab tests and certification tests Amsoil is always the best. I've got $80k into my Yukon Denalli and I am not going to skimp on Walmart oil. I used to be a certified master mechanic and have done a ton of monitoring on various hot rods I've built and most of the oil out there is junk. I've seen name brand oil start breaking down at 300 miles.

 

[tsuintx]

Amsoil. I have 360,000 on my 03 Suburban and a compression check is still like new. I have beat that thing to death and it runs better than new and is the smoothest idling vehicle I own.

My son-in-law has an 02 Sierra 4.3 V6 with 420K+ miles his grandpa bought brand new and gave to him when he went to college. At the time it had 250K+ miles. Knowing his grandpa and how stingy he is, I can guarantee you that thing hasn't had Amsoil, let alone a whole lot of synthetic oil ran through it over all those miles/years. I know my SIL hasn't. And that thing still just keeps chugging along with no running issues.

Just saying...

 

[Shunto]

What the Manufacturer recommends.

 

[jasonb100272]

What brand fluids are you all using for you trucks?

1. Oil
2. Transmission Fluid
3. Front diff
4. Rear diff
5. Transfer case

I usually use Mobil 1 in my other vehicles. I just got this 2019 Yukon and I was going to change the oil. I see that you need to use Dexos 1 approved oil. I saw the other day at Farm and Fleet that Peak oil was Dexos approved.

Just wondering what you all use.

TIA

Dejavu time

https://www.tahoeyukonforum.com/threads/which-engine-oil-do-you-use.122653/

For engine mobile 1.. tyranny, and diff i run BG but have read on transfer case only gm smurf lub. So that what I did. The transmission i thought was quite before I swapped it but it changed how smooth it is now. But there are a lot of good products. Out there

 

[MrBlack247]

Mobil 1
AC Delco
GM