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Al, back some time ago when I was using some very
expensive 2 stroke oils (like over $4.00/quart) , I decided to do some
research. I came to the conclusion that the Marine 2 stroke oils were
probably as good as was needed for our Rotary application. Some of
the 2 stroke oils designed for air cooled engines apparently have different
formulations to cope with the higher temps associated. In any case, I
decided the Wall-Mart Marine 2 stroke Super-Tech which meets TC-W3 standards(on
the back label) (and much less costly) was more than good
enough.
I no longer can find the source, but this oil was
reportedly produced by PENNZOIL for Wall-Mart.
I have been using it for 4 years without any
problem.
FWIW
Ed
----- Original Message -----
Sent: Tuesday, April 01, 2008 12:48
PM
Subject: [FlyRotary] Re: 2-stroke
oil
For the premix oil I use any good BIA
cert. TCW-3 2-stroke oil mixed 50-50 with MMO both of which come from
Walmart. Any of the Redline 2-stroke oils would be excellent, including
the snomobile stuff.
The only 2-stroke
oil I could find at the local Walmart was called Super-Tech, and I couldn’t
find any certifications on it anywhere. Is MMO proven for this
application? My research also indicates that the TCW-3 rating only is
not recommended for watercraft (water-cooled engines), where the NMMA rating
is required. So do we best get the stuff for air-cooled 2-stroke – which
probably run hotter; the stuff for watercraft – which probably run cooler; or
something else (other than Redline). Or is there no data to support a
choice and I’m over-analyzing and it doesn’t matter
anyway.
Let us know if you notice any change when
you go to premix. My old 1988 RX-7 felt spunkier when I started using
premix in it but it was an old 150K mile beater.
If you were doing
the 50-50 MMO at the time, that could make a difference. It contains
both toluene and xylene which are very combustible. Some 2-stroke oils contain
other octane enhancers. The Super-Tech is ‘pre-diluted’ (“with what”?
you may ask) to make it mix more readily with fuel.
What Pre-mix
ratio?? IIRC, I’ve
heard on this list to use about 1 oz per gallon, which is about 130:1.
Most 2-stroke applications are somewhere in the 20 to 50 :
1.
Al (Still grounded
working on mods)
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