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stol wrote:
> Clay wrote:
>
>>Is anyone using Royal Purple Synthetic Oil in their aircraft engine?
>>
>>If so, how do you like it? Are the temps down? How far between oil
>>changes? What engine are you usine it in?
>
>
>
> I started my new motor out on Valvolibe 40# racing oil and at 30 hours
> switched to Amzoil 40#. After less then 10 hours the distributor drive
> gear destroyed itself. I called Amzoil and the tech there admitted the
> poor high load carrying capacity their synthetic oils have has caused
> that same failure in lots of engines. I'm back on Valvoline and all is
> running well. For what is is worth the syn oil did run about 15 degrees
> cooler then the petroleum oil does.
I have never heard of Amzoil. Is it anything like Amsoil? I am surprised
they would admit any such deficiency given their past marketing
practices. They hype the four ball test constantly and that is supposed
to be a measurement of film strength.
Matt
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