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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)
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