Oil Change

Bob2C · November 26, 2019

So today I changed my oil in the 5.3. I have been using Mobil 1 EP 0w-20 and always had oil pressure at 20psi or lower when idling. I decided to try the Shell Rotella gas truck 0w-20 and noticed my oil pressure now at 30psi constant when idling at operating temp. Curious as to how this can be if viscosity is the same.

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Grumpy Bear · November 26, 2019

1 hour ago, Bob2C said:

Curious as to how this can be if viscosity is the same.

You mean that to be a question not a statement, right?

20 psi when hot with the Mobil 1. 30 psi cold with the Shell. That would be my guess.

Bob2C · November 26, 2019

You mean that to be a question not a statement, right?
[emoji848]

20 psi when hot with the Mobil 1. 30 psi cold with the Shell. That would be my guess.

Yes. Question. Multitasking gets harder as I get older. Lol

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Grumpy Bear · November 26, 2019

14 minutes ago, Bob2C said:

Yes. Question. Multitasking gets harder as I get older. Lol

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Me to.

RedGirl · December 13, 2019

I'm no expert on the subject, but I've been using mobile 1 consistently on all of our trucks. I've had 2 Yukon Xl Denali trucks, starting in 2001 and only recently I changed over to Escalade. I also use Mobil 1 in that. I also follow Scotty Kilmer and youtube, and the guy, though a bit obnoxious, appears to know his stuff, always says that all oils are really good but he recommends to just stay with 1 brand. Just pick the one that you like, that favors your wallet and your vehicle and stick with it. He says a lot more, so maybe check him out and see if it suits your needs. I started with Mobile 1 because Costco sells it so I save and it works fine. For all the other fluids I have gone to Amsoil. Maybe it's in my head but I did the front and rear differential in my husband's Colorado with Amsoil and it feels better. Also did the transfer case with Amsoil. I use it in my son's xterra too. Maybe it's over kill but I know what I'm putting in the truck and I'm saving sooooo much doing it myself that it's worth it to me.