Is Shearing and Oxidation happening at the same time?

[Motor oil rookie]

How long are you going keep this going?

I want to learn.

 

[kschachn]

I want to learn.

Is that it.

 

[Motor oil rookie]

Is that it.

Yeah. I have learned so much so far.

 

[kschachn]

Yeah. I have learned so much so far.

You could’ve fooled me.

 

[OVERKILL]

I see. They say my Pentastar is very easy on oil. So it cannot do that. So I'm good with HPL Supercar 0W-20.
Can one buy a shearing machine?

The Pentastar is port injected, so fuel dilution isn't an issue. It has a reasonably large sump and good thermal controls, so, despite having a fair amount of timing chain, it's reasonably easy on oil (as evidenced by the 626,000 mile Pentastar example).

 

[Motor oil rookie]

The Pentastar is port injected, so fuel dilution isn't an issue. It has a reasonably large sump and good thermal controls, so, despite having a fair amount of timing chain, it's reasonably easy on oil (as evidenced by the 626,000 mile Pentastar example).

Give me example of an engine that shears the @@@@ out of the oil. Supercharged Hemi?

 

[Strumpan_]

Give me example of an engine that shears the @@@@ out of the oil. Supercharged Hemi?

Engines with a lot of chains, turbo and DI. A pushrod V8 won’t tax an oil that much.

 

[mr_boring]

You could’ve fooled me.

Ah c'mon - we put up with that one guy with the Taurus that kept on asking us if we wanted him to post pictures of his dipstick for MONTHS.

 

[Plumb Bob]

How long are you going keep this going?

Easy. He hasn't even gotten to Death Valley yet.

 

[Motor oil rookie]

The Pentastar is port injected, so fuel dilution isn't an issue. It has a reasonably large sump and good thermal controls, so, despite having a fair amount of timing chain, it's reasonably easy on oil (as evidenced by the 626,000 mile Pentastar example).

Hey, I just received report of my Red Line. They say oxidation value is very high, so it must contain truck loads of Ester. Can't wait for November when I do used oil analysis.

 

[Motor oil rookie]

My lil Jeep has been on diet of some serious oils. Now nothing can stop me from breaking that Ram Pentastar Promaster's 600,000 mile record

 

[OVERKILL]

Hey, I just received report of my Red Line. They say oxidation value is very high, so it must contain truck loads of Ester. Can't wait for November when I do used oil analysis.

View attachment 279115

Yes, Redline always shows high virgin oxidation due to the ester content.

 

[Motor oil rookie]

Yes, Redline always shows high virgin oxidation due to the ester content.

What advantage does high oxidation give Red Line against oils like Mobil 1 EP?

 

[OVERKILL]

What advantage does high oxidation give Red Line against oils like Mobil 1 EP?

None. Esters raise the base oxidation as measured via oil analysis, certain esters raise it more than others. The one(s) Redline use seem to push the number up a fair bit.

 

[kschachn]

None. Esters raise the base oxidation as measured via oil analysis, certain esters raise it more than others. The one(s) Redline use seem to push the number up a fair bit.

Esters have carbon-oxygen double bonds (C=O) that are interpreted by the ASTM test as oxidation (which it is, but not what is "bad" in motor oil). It is more or less an artifact of the test. Some esters have more of these bonds, perhaps Red Line uses a particular ester that has a high number of them. Both quantity and type will affect the observed value.

 

[Motor oil rookie]

None. Esters raise the base oxidation as measured via oil analysis, certain esters raise it more than others. The one(s) Redline use seem to push the number up a fair bit.

I couldn't find a date code. Does the batch# say anything? 24L2004

 

[SubieRubyRoo]

Viscosity loss is most rapid early on, then tapers off. That viscosity loss from shearing happens at a faster rate than oxidation. Eventually oxidation will slowly start raising the viscosity, but most people don’t run oils long enough for the viscosity to equal the virgin viscosity. If the oil is run extremely long so the remaining active antioxidants drop to a critical concentration, viscosity increase from oxidation rapidly rises. Outside of testing, the only people that run oils that long (likely >20k miles) are the utterly neglectful types who quickly ruin their engines.

Oils without viscosity index improvers experience negligible viscosity loss from shearing. Only the dispersants are prone to small amounts of permanent shearing.

My catch can testing on HPL PCEO 5w30 showed surprising results; even surprising @High Performance Lubricants as not only the lighter ends of the oil ended up in the can, but also a measurable amount of the add pack. High Noack is an insidious, hidden killer of oils. The more the oil evaporates, the more add pack it carries with it. A max-Noack oil will leave your engine with… Lucas oil stabilizer. The heavier ends with no additives left!

 

[OVERKILL]

I couldn't find a date code. Does the batch# say anything? 24L2004

View attachment 279285View attachment 279286View attachment 279287

Would have to ask @High Performance Lubricants whether the batch code corresponds to a date.

 

[Motor oil rookie]

Would have to ask @High Performance Lubricants whether the batch code corresponds to a date.

Will shoot Mary an email.

 

[Motor oil rookie]

Thank you everybody for calling my lil Jeep a supercar