Briggs manual says Vanguard 15w50 temps down to 20F and for commercial use that I do. SJ,SL,SM,SN or higher, however it also lists a syn 5w30 saying it provides the best protection at all temps, but I feel that is too thin for the heat that thing puts out. Dealer said no less than 10w40 for the vanguard and 15w50 is preferred for our area. Kawasaki manual says 10w40 is recommended for most conditions down to 14F but list a 20w50 down to 32F and 15w50 down to 20F. SJ or SL oil is recommended for Kawasaki. It currently has Kawasaki Ktec 10w40 in it around 25 hours on the oil and 35 hours on the mower.
Amsoil 15W-50 Small Engine Oil - VOA
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Update: Amsoil said those zddp levels are normal for the oil. Something about it uses a different type of zinc then say the z-rod line oils. They also said too much zinc in a small engine would lead to more deposits. I will say under the valve cover on the vanguard it was very clean this spring when I adjusted the valves.
Which is what I was trying to say before I got flamed. There are different kinds of zinc.
Flamed? You made an incorrect statement. You said that the UOA did not show all the zinc and phosphorus. That’s incorrect as a spectrographic analysis will show all elements regardless of the compound.
And there aren’t “different kinds of zinc” either. There may be different zinc compounds, but this would be unusual for a ZDDP type additive to be more or less effective without one central Zn atom. Either way the UOA or VOA will show all the zinc there is. All is detected.
Is that exactly what they said to you?
If there is indeed a different type of zinc that is not detected, then I was exactly right actually.
Different zinc chemistry I believe was his exact words
How many types of zinc are there and which ones aren’t detected in an ICP?
You and I both know you are trying to bait me to say there is more than one type of Zinc, referring to the element and not the catch-all for additives containing zinc. I’ll turn it back and say this, will you acknowledge error if you find there are more zinc additives than just ZDDP?
You have a fundamental misunderstanding of what is being presented both in that analysis and in the article you link. The article is pointing out that there can be structural changes in the molecules that may make a compound less effective, and those changes can be seen both in NMR and FTIR (both of which I've used in the past for just this kind of analysis). However, no matter the functionality of the molecules, the zinc atoms are still present and will show up in a spectrographic analysis (UOA or VOA). So when you say "It’s likely the Zinc and Phosphorus weren’t seen on this VOA fully" that shows you don't understand what an ICP shows and does not show. Even completely degraded ZDDP-like compounds as discussed in that article would still show the same concentration of zinc atoms as a fully functional molecule. So in the UOA or VOA they will indeed be fully seen.
From my post #4.
Amsoil says:
"Fortified with a heavy dose of zinc anti-wear additives". This low amount of zinc in any discussion is not a heavy dose. They know zinc is a buzzword, and are misleading IMO with this statement on this oil. If it's a different zinc compound, then say it.
It seems Amsoil says too much zinc in a small engine leads to deposits, yet say a "heavy dose" in literature for a small engine oil. LOL, Amsoil.
Amsoil says:
"Fortified with a heavy dose of zinc anti-wear additives". This low amount of zinc in any discussion is not a heavy dose. They know zinc is a buzzword, and are misleading IMO with this statement on this oil. If it's a different zinc compound, then say it.
It seems Amsoil says too much zinc in a small engine leads to deposits, yet say a "heavy dose" in literature for a small engine oil. LOL, Amsoil.
Amsoil uses proprietary ingredients and base oils in much of their products,,,and they work well due to excellent formulations, and worth using in your application and perhaps in other formulations they have, as this information is not made public. Not much other chemical properties are going to show up on a universal oil analysis, a more Indepth testing maybe required to tell more but costly.
By any lucky chance is there any of this oil left? Need to send it in.
I think I have a 1 unopened quart of it left from that batch.
Still up in the air on sending it in. Thanks
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