Engine Oil

[Mark Frantz]

Anyone using Mobile1 0-W40 with dexos instead of the 0-W20 ?

I got a 2011 Z71 with a 5.3 and run Mobil Delvac 15-40 in it for 11 years with 310,000 miles on it , zero issues with the engine

 

[clstark7]

Anyone using Mobile1 0-W40 with dexos instead of the 0-W20 ?

I got a 2011 Z71 with a 5.3 and run Mobil Delvac 15-40 in it for 11 years with 310,000 miles on it , zero issues with the engine

I have been running the 0W-20 but I always cringe at how low my oil pressure can get, so I am following to see what you find out!

 

[R3D1]

You should go to bob is the oil guy. I run 5w40 in my personal trucks. My work Trail Boss will get that after all warranty is exhausted. You will have no problem running a higher viscosity oil in these engines.

Either way you decide, just change at a shorter interval than the oil life monitor. I run 5,000 miles or less on oil changes. Others may poo-poo on this but realistically it's your truck, pick your oil based on application but change it often.

 

[Stormin08]

my comment to the above is this, ONE of the issues GM previously had was the orifice size into the lifter body to create pressure to pump it up, or to allow proper bleed out....thicker oils were a blame at one time, due to that allowing the oil to coke more easily in the body... it was always stated by GM service to only run the recommended oil weight.

Not saying i do, but that was their claim

 

[Mark Frantz]

I forgot to add in my post that I've ran Pro Lube in all my vehicles for many years no matter what oil I used with awesome results

 

[BigBlackie_'25TB]

I like following Lake Speed Jr's YouTube videos. If you look up "The Motor Oil Geek" on the site, you will find some great clips. My vehicle calls for 0w20, but according to Mr. Speed, this thinner oil viscosity is due to C.A.F.E. requirements related to fuel efficiency and I will be going to a thicker weight because I trust the information from The Motor Oil Geek versus vehicle manufacturer's recommendations.

 

[clstark7]

I like following Lake Speed Jr's YouTube videos. If you look up "The Motor Oil Geek" on the site, you will find some great clips. My vehicle calls for 0w20, but according to Mr. Speed, this thinner oil viscosity is due to C.A.F.E. requirements related to fuel efficiency and I will be going to a thicker weight because I trust the information from The Motor Oil Geek versus vehicle manufacturer's recommendations.

This is what GM will be having you do as well if you have the L87 6.2L engine in a 2021 to 2024 truck. After their recall notice officially goes out, that is, and you pass inspection.

 

[RET-G]

I like following Lake Speed Jr's YouTube videos. If you look up "The Motor Oil Geek" on the site, you will find some great clips. My vehicle calls for 0w20, but according to Mr. Speed, this thinner oil viscosity is due to C.A.F.E. requirements related to fuel efficiency and I will be going to a thicker weight because I trust the information from The Motor Oil Geek versus vehicle manufacturer's recommendations.

Is he really accurate or is he using an old saying since auto manufacturers started to go to thinner oil? I lived in Rochester MI from 2005 -2008 and had some neighbors who were in GM engineering (GM's Tech Center as about 12 miles away) and they were saying the use of thin oil is primarily due to the tighter clearances on new engines, not from the fact it increases fuel mileage (as some state).
Lake has some great info, but I know with my 3.0L I am not going to destroy the warranty on his word so I'll continue with the 0-20 and if I still have it after the warranty period, I "might" research. However, the info from GM engineering as neighbors and friends means more than an internet oil dude.
As for the 6.2L I take that as being as different from my 3.0L as a rattlesnake is from a king snake.

 

[Stormin08]

Lake has also stated, he was a part of team developing the LT series lubricants...they saw a NEED for 5w30.

how much tighter can the TOLERANCE go before we are metal on metal ??? if 20w is say .002" film thickness, the comment about HIGHER TORQUE at low rpm makes perfect since as to why they are failing...the film is PUSHED out.

why do high performance engine builders NOT recommend 20w oils, if it helps the engine overall ????

 

[BigBlackie_'25TB]

The best advice I can give is to do oil tests between oil changes to find out where all your numbers are when it comes to wear. All I know is as temperatures increase, viscosity decreases and vice versa (as temperatures decrease, viscosity increases).

 

[BigBlackie_'25TB]

This is what GM will be having you do as well if you have the L87 6.2L engine in a 2021 to 2024 truck. After their recall notice officially goes out, that is, and you pass inspection.

Exactly! So, when people mention the issue with internal tolerances/clearances, I do not necessarily believe this argument. If you look into the weights of oils used in different countries in the same engines, this raises a red flag because why would the same engine in a comparable climate in a different country use completely different thicker oil viscosities than in the United States? I am in the belief that is has to do great deal with the EPA/C.A.F.E. requirements in the United States. You can say the same thing about the bullshit AFM/DFM and ridiculous Auto Stop/Start functions! In my opinion, it is all hogwash when it comes to manufacturers recommending lower viscosity oils. I just cannot believe running"water" oils versus "sufficient thickness" oils is better protection for the internals of an engine.

 

[RET-G]

Exactly! So, when people mention the issue with internal tolerances/clearances, I do not necessarily believe this argument. If you look into the weights of oils used in different countries in the same engines, this raises a red flag because why would the same engine in a comparable climate in a different country use completely different thicker oil viscosities than in the United States? I am in the belief that is has to do great deal with the EPA/C.A.F.E. requirements in the United States. You can say the same thing about the bullshit AFM/DFM and ridiculous Auto Stop/Start functions! In my opinion, it is all hogwash when it comes to manufacturers recommending lower viscosity oils. I just cannot believe running"water" oils versus "sufficient thickness" oils is better protection for the internals of an engine.

Your vehicle, your opinion....but to always go after fuel mileage like many do with NO proof otherwise; MIGHT be dangerous to the factory warranty. I know a guy once who put over 80K miles on a 4.9L, inline six Ford truck motor before doing an oil change....he had a different view on oil and oil changes too. (Didn't listen to him either...that was when I lived in TN.)

For me, at this time, I'll believe the good friends WHO are GM engineers for GM Powertrain who live in Rochester Hills where I used to live before I will believe opinions of people I do not know on the internet. Especially, when I get employee pricing from one of them on a purchase of GM vehicles.
Otherwise, I'm out of the internet oil discussions as with any discussion in a bar on who's truck is better; Ford, GMC, Chevrolet; RAM, etc. Goes no place other than a shit flinging contest.

 

[Stormin08]

so what do the friends say >>> because THE TRIBOLOGIST stated the DI engines from GM originally needed 30W as a min....then C.A.F.E. requirements had the GM boys switch to 20...and look at us now.

if you really want to know, send samples off and look for bearing material

 

[BigBlackie_'25TB]

so what do the friends say >>> because THE TRIBOLOGIST stated the DI engines from GM originally needed 30W as a min....then C.A.F.E. requirements had the GM boys switch to 20...and look at us now.

if you really want to know, send samples off and look for bearing material

Exactly! That's what i have been saying!

 

[BigBlackie_'25TB]

Your vehicle, your opinion....but to always go after fuel mileage like many do with NO proof otherwise; MIGHT be dangerous to the factory warranty. I know a guy once who put over 80K miles on a 4.9L, inline six Ford truck motor before doing an oil change....he had a different view on oil and oil changes too. (Didn't listen to him either...that was when I lived in TN.)

For me, at this time, I'll believe the good friends WHO are GM engineers for GM Powertrain who live in Rochester Hills where I used to live before I will believe opinions of people I do not know on the internet. Especially, when I get employee pricing from one of them on a purchase of GM vehicles.
Otherwise, I'm out of the internet oil discussions as with any discussion in a bar on who's truck is better; Ford, GMC, Chevrolet; RAM, etc. Goes no place other than a shit flinging contest.

I like this video clip. A different individual mechanic.