5w30 oil

Gangly · September 27

4 hours ago, AJMBLAZER said:

I’ll be short on acronyms and testing data but I put 5w30 synthetic in my 5.3L yesterday and it seems quieter and smoother so far. No warning lights or new issues. The starts after auto-stop are much smoother and quieter.

@Gangly

Glad to hear it, I had similar results when I switched over.

Grumpy Bear · September 27

5 hours ago, customboss said:

Engine oil bench testing like HTHS that you reference above ON USED oil will look different than a polymer shredding test in a video with a clean formulation. HTHS, Kinematic and dynamic vis readings will change. THE ENGINE test procedures allow vis loss both temporary and permanent in your commentary above shows you don't know what you are talking about as you mix bench testing with engine testing and back and forth. My commentary about HTHS, Kinematic readings in used oil allows losses of certain %'s. Mobil knows that and formulates to stay inside those boxes.

On used oil? Ya don't say. No coconut trees at my house. :crackup: The rest is junk (I'm being nice).

What happens after it's run is WHY YOU CHANGE IT. :idiot: Combustion alters it. I'm not mixing anything.

Ya got this really bad habit of shoveling crap on the floor. Listen up. There are ZERO self-healing VI polymers.

Stay on task.

Grumpy Bear · September 27

On 9/26/2024 at 10:40 AM, customboss said:

Limiting HTHS loss is not always indicative of the oil not meeting the min film needed in your engine.

Mobil 1 uses formulations that BY DESIGN thin slightly so over drain period they stay

in grade because their polymers reattach over time. That’s the formulation plan.

@customboss I went to my room to think about your words. You were about to tell me to go there anyway. :crackup:

I think, and I may be wrong, that 'reattach' was an unfortunate choice of words. I THINK you mean that they recover from stress that makes them YEILD but not BREAK. If that is true then your talking about 'temporary losses' of viscosity. The very thing the HTHS test is designed to find. If so, I agree on that point. If you literally mean broken chains repair themselves then you just nuts.

I know you know this but still it is not common knowledge. The stress levels used for the HTHS test are indicative of those in the JOURNAL BEARINGS of running motors. Problem is, they are not the stresses seen in the ring to bore or lifter to cam lobe which are higher. The realm of the HTFS test. That's just info for the masses. Back to HTHS and its relevance to wear in general....:

Cam and small end bushings will continue to see a reduction is wear with more viscosity to about 3.5cP.

This hopefully is self-explanatory.

Picture a 0W20 oil with a mandated 2.6 cP HTHS that uses an OCP polymer which will shear down about 5% or 2.47 cP

Now picture the cam and ring area that live in the HTFS zone at load and speed and that number is now under 2.2 cP.

Picture the GDI motor which can easy loose twice that on fuel dilution and you get what Dizzy got. Shot bores polished silly. Did Mobil 1 plan on GM making crap rings and leaky pumps? Stop start and motor boosted hybrids like Nicks drowning in fuel? Or did both GM and the license do the actuaries and determine the "Probability" of this happening was an "Acceptable Risk". Yea, that....

Now let's do 0W16 with its 2.3 cP starting point. :crackup:

Do as you please and many will never have an issue. Not everyone is stinker. But tell ya what. I will add cushion until the cows come home and keep my motors when the pump pukes or the oil concerns get ever cheaper with the product.

You have a nice day.

Grumpy Bear · September 28

On 9/27/2024 at 10:11 AM, diyer2 said:

Where have I been Grumps? You bought a new car?

Yep, cheap little shoebox I call Raven. So far about 55 mpg median. Had a few tanks over 60 mpg. I am dodging June Bugs however in the interest of safety. Mirage G4. 1200 cc triple and a CVT.

Grumpy Bear · September 28

Grumpy Bear · September 29

All this babble and zero specifics from anyone. :mad:

customboss · September 29

On 9/26/2024 at 1:49 PM, Grumpy Bear said:

That’s why I’m here to keep your smart train on the tracks.

TheRiver · September 29

My '16 starts up, and runs real quiet with QS 5w40 Euro blend.

Grumpy Bear · September 30

VISCOSITY

Lake mentions that too much viscosity can peal lead right out of the bearings.

If true, no motor north of the 40th parallel would last a winter. Yes, I've seen oil pump drive shafts broken in both SBC and SBF in the winter and while in the absolute his statement is correct. It is also irrelevant and misleading. You motor sees daily more viscosity shift between start up and full warm up than any number of SAE grades possible.

He and a few of his friends claim an increase in viscosity will slow the flow rate of the system and 'starve' the critical parts. What? Tell ya what Lake. It's a positive displacement pump. The rate is set by the pump and not the viscosity and as such what does change is pressure. Ya see it first start of the day. Right back to the first statement.

I used to believe that big end rate was set by the side clearance of the rods until I watched a Pro Builder fit a very narrow modern rod on a very wide flat head journal and never lose a pound of pressure and they don't have much to begin with.

This ZDDP argument that any modern oil of any SAE classification will acidify and corrode bearings is a snow job. Yea it can happen if free hand blending extra. Just not in any APPROVED motor oil. Useless and in the video the value is unstated BUT a reference is made to break in oils that are typically in the 2500 ppm range.

There seems to be this insane need to scare the crap out people to keep them in line and dependent. I don't need this from my lab. I need my lab to provide results that are accurate and dependable.

Grumpy Bear · October 4

080244_Asteric.indd (lubrizol.com)

OnTheReel · October 6

Here’s some complete crap from Lake:

Basically making a blanket statement off of ONE test of an oil (with an unknown mileage on it to boot).

You can trust the OLM, it’s actually conservative and there’s no need to even have analysis done.

Starting to think for every one of his good videos there’s another that’s simply idiotic.

Grumpy Bear · October 6

What do you think the difference might be between "Personalizing" and "Being Convinced"?

As a core belief I don't think there is a "Perfect" oil, and I believe they fall into several marketing strategies or engineering goals and is no particular order:

1.) Performance first

2.) Regulation/Licensing first

3.) Profit/Margin first

4.) Ecology first

5.) I also believe there are blenders that try to straddle fences.

I believe you can use any of them if the OCI is appropriate and oil matched to the service. I don't use Red Line in Dizzy, and I don't use SAE 40 Traveler in Pepper. That should take care of how much I personalize an oil. :idiot:

I think if you are thoughtful and not gullible you will realize that you may have to be viscosity selective depending on which flavor you pour into your cup because VISCOSITY is the MOST important aspect of your oil. And I mean the viscosity is right IN THE PLACE, AT THE TIME UNDER THE LOAD AND AT THE TEMPERATURE that is present.

KRL matters. HTHS is the best indicator most of us will have of that. Everything else is 'support staff'.