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Duniway's "Pentavac 5" DP oil


Gomez
 

Has anyone used it? In their latest paper catalog, which arrived in the mail yesterday, Duniway claims that it has higher oxidization resistance, higher operating temperature limits, and lower vapor pressure at elevated temperatures than any other DP (diff. pump) fluid, including the exotic silicones such as Fomblin. They claim you can even expose the DP to atmosphere (they did it repeatedly in tests) without harm to fluid or pump. (!) They claim its back-streaming rate is so low that in most applications, a cold trap is not necessary. (!)

All of this seems too good to be true, but if true, it's a wonder product.

So, has anyone used it? It's hideously expensive, $130 for 100cc's, which puts it in the same class as the exotic silicone DP fluids, but if all their claims are true, it would be worth it.

- Bill "Gomez" Lemieux

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