Oil for a 6.6l gas Chevy 2500HD

[MikeB@Texas]

Hello,
I’m torn between Mobile 1 100% syn. and Castroil Edge SAE 5W-30. I’m sure they are both great oils but what is y’all’s opinion on the two. I will be pulling a travel trailer that weighs about 8000 pounds some of the time. Thanks in advance.

 

[92saturnsl2]

Flip a coin, seriously. I'm guessing most of the input you receive will amount to brand preference. They are both fine oils and meet the requirements of your engine with ease. I prefer Castrol myself.

 

[BMW Dom]

Whichever is cheaper

 

[tyman]

Castrol Edge ftw

 

[blufeb95]

Go to the oil aisle, see which jugs have Dexos1 written on the jug and buy one, it doesn't matter which one.

 

[Snagglefoot]

Yes, it’s all up to personal brand preferences. As long as it is Dexos 1, Gen 2 with a 5w30 grade, you can do no wrong. For those who haven’t seen the owners manual of a 2021 Chev 2500, here it is.

 

[64bawagon]

Mine has Pennzoil platinum 5W30 in it right now and will get Rotella gas truck next time. As long as its D1Gen2 in 5W30 youre all set.

 

[AZjeff]

Quaker State in mine and it seems happy. D1G2 in whatever brand you choose, it's your truck not ours.

If you haven't greased the 9 fittings on the steering you might want to check them out. It seems GM doesn't put much in.

 

[Ram02]

M1 5w30 vanilla flavor is all that chevy needs for a long healthy life

 

[MikeB@Texas]

Quaker State in mine and it seems happy. D1G2 in whatever brand you choose, it's your truck not ours.

If you haven't greased the 9 fittings on the steering you might want to check them out. It seems GM doesn't put much in.

Thanks, I have only had the truck for 1 month 1,800 miles. I will grease it on my first oil change.

 

[AZjeff]

Here's a thread with a link about the fittings from our fearless leader. I had a heck of a time getting the coupler on the first couple of zerks so I got a piece of emery cloth and gave the rest a quick polish and it helped.

Location of the 9 grease zerks on 2011-2021 GM/Chevy HD trucks

I posted this on the RV forum after the pleasure of greasing my truck. The three zerks on the pitman arm, idler arm, and idler arm pivot are very difficult to grease. Whoever decided to install straight instead of 90° zerks should be forced to grease any of these trucks the owner wants them to...

bobistheoilguy.com

 

[MacManus99]

Quaker State in mine and it seems happy. D1G2 in whatever brand you choose, it's your truck not ours.

If you haven't greased the 9 fittings on the steering you might want to check them out. It seems GM doesn't put much in.

What kind of grease did you use in yours?

 

[Snagglefoot]

Here's a thread with a link about the fittings from our fearless leader. I had a heck of a time getting the coupler on the first couple of zerks so I got a piece of emery cloth and gave the rest a quick polish and it helped.

Location of the 9 grease zerks on 2011-2021 GM/Chevy HD trucks

I posted this on the RV forum after the pleasure of greasing my truck. The three zerks on the pitman arm, idler arm, and idler arm pivot are very difficult to grease. Whoever decided to install straight instead of 90° zerks should be forced to grease any of these trucks the owner wants them to...

bobistheoilguy.com

Good post. By the way, the older 3/4 ton Chev’s say 2008, have 11 fittings. They had two more, which are two inner tie rod ends. Eleven.... that’s one more than 10.
( from Spinal Tap).

 

[Snagglefoot]

Here is an inner tie rod end. The factory originals were fed grease from a grease nipple on the steering link.

 

[Snagglefoot]

What kind of grease did you use in yours?

Jeff needs to reply but I’ll jump in and say I use synthetic grease made by Citgo and marketed as Mystic JT-6 High Temp Synthetic grease in the USA.
There are hundreds of other options. I have over 210,000 miles on all the steering and suspension components except the outer tie rod ends which were replaced at 190,000 miles.

 

[AZjeff]

What kind of grease did you use in yours?

Green. Pretty sure it's Lucas Xtra Heavy Duty. What else for an HD truck?

 

[GumbyJarvis]

Edge or Magnatec as a Castrol alternative

 

[userfriendly]

Yes, it’s all up to personal brand preferences. As long as it is Dexos 1, Gen 2 with a 5w30 grade, you can do no wrong. For those who haven’t seen the owners manual of a 2021 Chev 2500, here it is.

View attachment 63322

I'll go along with the 0W30 in super cold weather recommendation after seeing zero oil pressure in a 2017 6.0L 2500 GMC one winter morning in Hinton, Alberta. How about 10W30 in hot weather? What's good for the goose should be good for the gander.

 

[64bawagon]

Thanks, I have only had the truck for 1 month 1,800 miles. I will grease it on my first oil change.

Like many previous years theres a couple of fittings on the pitman arm and idler that benefit from a 90 degree fitting rather than the straight one. Makes future grease jobs much easier.

 

[wtd]

Between those two, I would go with Castrol.