AeroShell Aviation oil

[John D.]

Re: AeroShell Aviation oil

Verle, This is my favorite time of the year. We go to the ski resort and have a good time shing. Thanks for the invite though. JD

[John D.]

Re: AeroShell Aviation oil

Verle, This is my favorite time of the year. We go to the ski resort and have a good time shing. Thanks for the invite though. JD

[Scott Marzahl]

Re: AeroShell Aviation oil

Here is the spec and info for the subject aviation oil.

It meets MIL-L-22851D which has been superseded by SAE J-1899 which covers Ashless (detergent) aviaton oil.

Aeroshell Plus is Aeroshell oil with the Lycoming LW-16702 oil additive. Lycoming '76 series engines (engines such as the O-320H2AD) require LW-16702 per an Airworthiness Directive (AD) to prevent camshaft lobe galling. By offering the additive as part of the oil it simplifies AD compliance and assures that the oil receives the additive.

LW-16702 is classified as an "EP" (extreme pressure) that is a surface reactant that chemically combines with Fe forming phosphides or phosphates. This protective film is a few molecules deep, that is swept away by shearing friction, and renewed thereafter. Thus LW-16702 is, in a sense, actually corroding the metal surfaces, however slowly.

Here is the MSDS for 16702, as stated above it is a mixture of Phosphates, no zinc.

http://lib.store.yahoo.net/lib/style...16702-MSDS.Pdf

Because the reacted metal surface has low shear strength, the sliding friction is markedly reduced, and the tendency to severe adhesion is reduced or even eliminated.

The combination of a higher surface energy of the freshly worn surfaces, local high temperatures, possible catalytic effects and any other activation processes makes the action of LW-16702 specific, taking place preferentially at the wear points (surface irregularities) where it is most needed.

[Scott Marzahl]

Re: AeroShell Aviation oil

Here is the spec and info for the subject aviation oil.

It meets MIL-L-22851D which has been superseded by SAE J-1899 which covers Ashless (detergent) aviaton oil.

Aeroshell Plus is Aeroshell oil with the Lycoming LW-16702 oil additive. Lycoming '76 series engines (engines such as the O-320H2AD) require LW-16702 per an Airworthiness Directive (AD) to prevent camshaft lobe galling. By offering the additive as part of the oil it simplifies AD compliance and assures that the oil receives the additive.

LW-16702 is classified as an "EP" (extreme pressure) that is a surface reactant that chemically combines with Fe forming phosphides or phosphates. This protective film is a few molecules deep, that is swept away by shearing friction, and renewed thereafter. Thus LW-16702 is, in a sense, actually corroding the metal surfaces, however slowly.

Here is the MSDS for 16702, as stated above it is a mixture of Phosphates, no zinc.

http://lib.store.yahoo.net/lib/style...16702-MSDS.Pdf

Because the reacted metal surface has low shear strength, the sliding friction is markedly reduced, and the tendency to severe adhesion is reduced or even eliminated.

The combination of a higher surface energy of the freshly worn surfaces, local high temperatures, possible catalytic effects and any other activation processes makes the action of LW-16702 specific, taking place preferentially at the wear points (surface irregularities) where it is most needed.

[Duke W.]

Re: AeroShell Aviation oil

There's also a pdf spec sheet on the web site - just google "aeroshell".

Duke

[Duke W.]

Re: AeroShell Aviation oil

There's also a pdf spec sheet on the web site - just google "aeroshell".

Duke

[Roger S.]

Rotella not AeroShell Aviation oil

While not about aviation oil this is some information I got about Shell Diesel oil:

Info from the Shell Answer Man about the wear additives in Rotella the old CI-4 verus the new CJ-4 spec's.
He, actually a she, said

................... ..CI-4...........CJ-4
Zinc.............. 1390 ppm.......1210 ppm

Phospherous.........1265 ppm.......1110 ppm

About 12% lower for the new oil, but much more than the regular car SM spec oil.

Roger

[Roger S.]

Rotella not AeroShell Aviation oil

While not about aviation oil this is some information I got about Shell Diesel oil:

Info from the Shell Answer Man about the wear additives in Rotella the old CI-4 verus the new CJ-4 spec's.
He, actually a she, said

................... ..CI-4...........CJ-4
Zinc.............. 1390 ppm.......1210 ppm

Phospherous.........1265 ppm.......1110 ppm

About 12% lower for the new oil, but much more than the regular car SM spec oil.

Roger

[Duke W.]

Re: Rotella not AeroShell Aviation oil

ZDDP and other additives are consumed during the life of the oil in the engine, but given the low annual mileage that most vintage cars see, and assuming you are changing the oil at least annually, the slight reduction in ZDDP is nothing to be concerned about, and as I said before, the ZDDP concentration of CJ-4 is about the same as typical dual rated C/S oils from 10 years ago, which had about .12% Zn, which is 1200 ppm.

It's also worth noting that today's base stocks are better than even five years ago due to tougher oxidation requirements. The CJ-4 product - including the base stock and additive package is much better than any C or S-rated oil from the past, because the CJ-4 certification standards are tougher.

The actual CJ-4 spec limits P to .12%, so they are 90 ppm under the limit.

And once again, brand name is irrelevent. Any oil from a reputable supplier that carries the API "donut" with the CJ-4 service classification listed first is all you need.

If you want an education on motor oil take the "Fundamentals of Lubrication" and "API CJ-4 Lubricants..." courses at this web site:

http://www.lubricantsuniversity.com/

Then download and read API Specification 1509 Engine Lubricating Oil Licensing and Certification System:

http://www.api.org/certifications/engineoil/pubs/upload/1509_16thedition042007.pdf

Duke

[Duke W.]

Re: Rotella not AeroShell Aviation oil

ZDDP and other additives are consumed during the life of the oil in the engine, but given the low annual mileage that most vintage cars see, and assuming you are changing the oil at least annually, the slight reduction in ZDDP is nothing to be concerned about, and as I said before, the ZDDP concentration of CJ-4 is about the same as typical dual rated C/S oils from 10 years ago, which had about .12% Zn, which is 1200 ppm.

It's also worth noting that today's base stocks are better than even five years ago due to tougher oxidation requirements. The CJ-4 product - including the base stock and additive package is much better than any C or S-rated oil from the past, because the CJ-4 certification standards are tougher.

The actual CJ-4 spec limits P to .12%, so they are 90 ppm under the limit.

And once again, brand name is irrelevent. Any oil from a reputable supplier that carries the API "donut" with the CJ-4 service classification listed first is all you need.

If you want an education on motor oil take the "Fundamentals of Lubrication" and "API CJ-4 Lubricants..." courses at this web site:

http://www.lubricantsuniversity.com/

Then download and read API Specification 1509 Engine Lubricating Oil Licensing and Certification System:

http://www.api.org/certifications/engineoil/pubs/upload/1509_16thedition042007.pdf

Duke