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Date: Sun, 21 Nov 2004 15:39:32 -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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I don't think 2-stroke oil "precipitates" out of solution.  It's never 
happened that I can tell on my chain saw or outboard.  Haven't heard of 
it on anyone else's outboard.

As to whether MMO is better than 2-stroke oil, MMO is advertised mostly 
as a detergent.and an OIL additive.  NOT as a fuel additive AFAIK.  
2-stroke oil OTOH is the ONLY lubrication a 150 hp outboard EVER SEES.   
MMO doesn't advertise that, and if you were to call them up, I bet they 
would VIGOROUSLY OPPOSE substituting it for 2-stroke oil in your 
outboard.  I'll mix the WalMart 2-stroke every time.

Around draining excess oil out of sumps, I'm wondering if perhaps that's 
a sign you're mixing too much MMO/2-stroke in with your gas?  Perhaps go 
from 1 oz / gal to 3 oz / 4 gal or 2 oz per 3 gal until you're finding 
just a little extra in the sump.

Just a theory ... Jim S.


randy echtinaw wrote:

> *"One thing for sure, it would stay mixed up as I drive"
> *
> What happens to this mixture setting in the aircraft fuel tank for 
> extended time periods? Is a 5 minute "wing rock" a preflight 
> requirement:)
> Thanks,
> Randy
>
> On Nov 20, 2004, at 7:28 PM, Russell Duffy wrote:
>
>     Rusty, can you find bunch of disposable 5 oz bottles and toss them
>     out after use? Make sure you leave expansion room by squeezing the
>     bottle slightly before sealing the cap.
>     Bulent  
>      
>     Hi Bulent,  Actually, the 5 oz thing was just an example of what I
>     do for the 5 gallon jugs I was using to fill the plane.  There
>     would be no problem continuing to use the measuring cup for hanger
>     use, but even that won't be necessary very soon. 
>      
>     By the end of Thanksgiving weekend, I'll have a 91 gallon
>     tank installed in the truck, complete with 12V fuel pump and
>     meter.  When  I start using that, I'll have to either add oil to
>     the transfer tank when I fill it at the station, or leave the fuel
>     in the transfer tank clean, and add oil as I fill the plane at the
>     hanger.  That's actually why I asked the question about using less
>     than 1 oz/gal of oil.  My other engine is a 912ULS, which requires
>     premium, and would prefer to not have oil.  I have it from a
>     reliable source that using MMO in the 912 won't hurt a thing,
>     particularly if you keep the concentration as low as possible.  It
>     also won't hurt other engines it seems, so I've been thinking of
>     going back to MMO, and just mixing it in the transfer tank.  One
>     thing's for sure, it would stay mixed up as I drive.
>      
>     The problem is how to add oil when filling up at another airport. 
>     Clearly, from the responses, I'm worrying too much about exact
>     ratios.  I'll probably just buy a few quarts of MMO, then reuse
>     the bottles by filling them from gallon containers.  They seem to
>     be pretty heavy duty bottles, and have a nice long neck, so it's
>     probably as good as any. 
>      
>     Thanks,
>     Rusty (will never fill the plane without thinking about alligators)
>
>