Why HPL No VIIs PCMO Oil?

[Sloppy_Snood]

I am a long time BITOG lurker but decided to make an account to ask:

Why does HPL No VII motor oil exist and what issue/concern does it “solve?”

Thank you. -Slopster

 

[Zee09]

I gave you your first like

 

[spasm3]

For engines that really shear down oil, it has no Viscosity index improvers. The oil will maintain its viscosity. With an ester base, will most likely gain viscosity over its life.

I use it in my mazda DI engine, as it can fuel dilute in cold weather. While the oil will still lose viscosity with the fuel in it, it will not shear down, and will retain its viscosity when the fuel is boiled off.

Its use is really going to be limited to moderate climates, I would not want to use it below 0 degrees F.

It exists because HPL produced it by request from members here.

 

[Sloppy_Snood]

My understanding is that HPL PCMO Premium Plus has their nearly indestructible VII blended in so I suppose I am struggling with the No VIIs flavor’s purpose.

Why not just utilize something like HPL Premium Plus and maintain the viscosity with the broader environmental operating temperature range afforded by PAO/ester base oil?

Is there a difference in viscosity stability between HPL PP and HPL No VIIs pcmo’s with equal fuel dilution?

 

[Sloppy_Snood]

I gave you your first like

Thanks!

 

[kschachn]

My understanding is that HPL PCMO Premium Plus has their nearly indestructible VII blended in so I suppose I am struggling with the No VIIs flavor’s purpose.

Why not just utilize something like HPL Premium Plus and maintain the viscosity with HPL PP PCMO with the broader environmental operating temperature range?

Is there a difference in viscosity stability between HPL PP and HPL No VIIs pcmo’s with equal fuel dilution?

No Sloppy.

 

[Sloppy_Snood]

No Sloppy.

Then what is the advantage of No VIIs PCMO?

Simply shear resistance of the base oil?

 

[kschachn]

Oops sorry. “Slopster”.

 

[UncleDave]

I am a long time BITOG lurker but decided to make an account to ask:

Why does HPL No VII motor oil exist and what issue/concern does it “solve?”

Thank you. -Slopster

Some engine designs shear oil lot more than others and in worse than normal cases you can shear down a full grade or more by the end of an OCI with the grade degradation itself being the reason to change vs extend the life of the sump further.

In high output high temp sustained load scenarios you want the engine running closer to initial viscosity than beat down thinned out viscosity you get a the end of a OCI in one of these oil thrashing designs.

Where I notice it most as a driver is in pressure at idle after a long hard pull - and the back end of an OCI my needle will drop a good bit further than when it's fresh.

 

[RDY4WAR]

The HPL No VII was made by request of members here simply because we wanted it. The HPL PCMO P+ will not shear very much at all. One could argue the No VII oils would be slightly less volatile and slightly more oxidation resistant due to the use of mPAO.

 

[Astro14]

The HPL No VII was made by request of members here simply because we wanted it. The HPL PCMO P+ will not shear very much at all. One could argue the No VII oils would be slightly less volatile and slightly more oxidation resistant due to the use of mPAO.

Question asked. Answered.

And there is already a 40 page thread on the topic in which HPL addressed your question.

Thread 'High Performance Lubricants No VII series engine oils.'

Jan 10, 2023

Well it took a week longer than planned but we have the No VII series of oils put together. They are consistent with the respective PCMO and Euro series.

https://www.hplubricants.com/wp-content/uploads/2023/01/No-VII-Engine-Oil-PDS.pdf

• High Performance Lubricants
• hpl
• Replies: 816
• Forum: Passenger Car Motor Oil (PCMO) - Gasoline Vehicles

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