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Marvel Mystery Oil (MMO)
Ed Anderson
----- Original Message -----
From: "Bob White" <bob@bob-white.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Sunday, November 21, 2004 10:34 AM
Subject: [FlyRotary] Re: MMO vs 2-cycle (was Re: how do you carry, and
measure oil?)
OK, I give up. I thought after a few comments I could figure it out,
but what is MMO exactly?
Bob White
On Sun, 21 Nov 2004 08:39:27 -0600
"Russell Duffy" <13brv3@bellsouth.net> wrote:
> I have used the MMO/2 cycle mix in the past but for the last 100
> hours I
> have been using the Wal-Mart Marine 2 cycle oil. After reading up on
> the different classifications of 2 cycle oil (most brands are all in
> one now) and looking at the temperature profiles for the apex seals I
> concluded that almost anything would do a better job than crankcase
> oil of lubricating the seals. And 2 cycle certainly leaves less
> residue than crankcase oil.
>
> Mornin' Ed,
>
> Is MMO and 2-cycle oil close to the same thing? When I try to
> rationalize using one over the other, I come up with one other issue.
> Our pre-mix oil does get scavenged into the crankcase to some extent.
> MMO is made to be used in fuel, and oil, so that's not a problem. I
> can't say that I've ever heard anyone comment on the effect that
> 2-cycle oil has in our crankcase. I've wondered if this alone is a
> reason to prefer MMO over 2-cycle oil.
>
> Another question just came to me. Does oil injection cause oil to be
> scavenged into the crankcase? I'm assuming it would be less than what
> we get with pre-mix, though some must make the trek. I wonder if
> Mazda considered that when deciding to use crankcase oil for the apex
> seals? Of course originally, they weren't using the dripper
> injectors, but rather injecting the oil into the fuel/air stream at
> the carb.
>
> Cheers,
> Rusty
>
>
>
>
--
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