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Date: Sun, 21 Nov 2004 20:52:57 -0600
From: Jim Sower <canarder@frontiernet.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: how do you carry, and measure oil?
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Actually, I think the upper lube oil (2-stroke or MMO) gets into the 
crankcase during the power stroke. These oils are advertised as 
"ashless" which implies that when they burn, they leave no 
[significant?] residue/ *Nowhere* does it say that it *all *burns. On a 
pusher it will get all over the prop. On a tractor it may leave you with 
an oily belly. As most of it burns (ashlessly :o) some of it blows by 
into the crankcase sump, the rest goes over the side.

Or so it seems to me ... Jim S.

Bob Perkinson wrote:

> The fuel vapors are blown overboard and only minute traces of oil are 
> left behind. Multiply it by few million repetitions and you end up 
> with extra oil. That’s my theory?
> Bulent
>
> Bulent,
>
> If that’s the case then, for every oz. of oil in the sump there was a 
> gallon of fuel that went overboard in vapors with a mixture of 1to128.
>
> Bob Perkinson
>
>
>
>