When mixing some oil for my weed eater, which is a 2-stroke engine, I didn't
have enough oil, so I substituted some engine oil to make up the difference.
Question: Why not just use engine oil? What is special about 2-stroke oil?
Years ago I had a couple of Saabs, with 2 stroke engines. I'm pretty sure
they recommended either "Saab" 2 stroke oil or straight 30 weight oil as a
"Ook" <Ook Don't send me any freakin' spam at zootal dot com delete the
Don't send me any freakin' spam> wrote in message
On Mon, 7 May 2007 16:52:01 -0700, "Ook" <Ook Don't send me any
freakin' spam at zootal dot com delete the Don't send me any freakin'
Back in the olden days you were told to use non-detergent 30w in your
small 2 strokes and it will work but there are better oils these days
(all the things the other posters have pointed out.)
I bought a gallon of Quicksilver TCW3 for 12 bucks at Sams and that is
probably a lifetime supply in my weedeater and chain saw.
Bingo! Engine oil is not designed to be burned! That makes more sense then
anything else. Hmm...Question: I have a couple dozen small airplane engines,
displacement .05 to .35. They are two stroke engines, and the fuel is
methonal, optional nitromethane, and 25% oil, mostly castor oil. Castor is
considered best because it does not break down under high temperatures,
whereas the synthetic oil can burn or break down. If you have one lean burn,
you can ruin the engine if you are using synthetic. If you burn 25% castor,
the engines last forever. So, can I use castor oil in the fuel? I'm thinking
not - I think the gasoline engines burn hotter, and I don't know how castor
burns. More important - in the small engines, the castor is ejected from the
exhaust and can make quite a mess. It would not be good to have hot castor
oil dripping out of the exhaust.
According to Ook <Ook Don't send me any freakin' spam at zootal dot com delete
the Don't send me any freakin' spam>:
Castor oil was used in full size 2-stroke aircraft engines during WWI.
One of the things that these pilots had to contend with was long flights
during which being continually sprayed in the face with vaporized castor
Hint: castor oil is used as a laxative.
Location of outhouses near the landing field was pretty important,
but tends not to be mentioned much in modern accounts ;-)
One advantage of castor oil is that it's a plant product,
non-toxic and biodegradable. Wikipedia sez:
Castor oil maintains its fluidity at both extremely high and low
temperatures. Sebacic acid is chemically derived from castor oil.
Castor oil and its derivatives have applications in the manufacturing
of soaps, lubricants, hydraulic and brake fluids, paints, dyes,
coatings, inks, cold resistant plastics, waxes and polishes, nylon,
pharmaceuticals and perfumes. In internal combustion engines, castor
oil is renowned for its ability to lubricate under extreme conditions
and temperatures, such as in air-cooled engines. The lubricants
company Castrol takes its name from castor oil. However, castor oil
tends to form gums in a short time, and its use is therefore
restricted to engines that are regularly rebuilt, such as motorcycle
Model airplane engines would be classified as "frequently rebuilt".
I remember cleaning the gunk out of the guts of mine.
You'd probably find that using castor in a lawn mower would work
great for a while, then you have to take the motor apart. And, not
get too far away from a washroom...
Age and Treachery will Triumph over Youth and Skill
Rotary engines are designed to burn oil, about one quart per 1000 miles.
They actually have oil injectors underneath the butterfly, somewhere in the
intake manifold near the engine. And they use regular engine oil. I've seen
a lot of rotary engines, and I've never seen one that had problems from
burning oil. Of course, they are very different beasts then the
reciprocating piston engines. I have, however, seen them die because the oil
injector stopped working. And I've seen a lot die before they finally
learned how to design them to that they didn't blow out after 40,000 miles
Quicksilver is a marine designated 2 stroke oil rather than a general
purpose 2 stroke oil. I've used them interchangeably and never
noticed any difference, yet manufacturers identify them separately.
What is the difference??
On May 7, 10:04 pm, email@example.com wrote:
My Lawnboy is very particular in using its own oil. A gallon of other
2 cycle oil I was using was clogging it requiring a trip to the shop
every year. A lot cheaper to buy the Lawnboy brand than a $50 to 80
annual service. Regular motor oil does have additives not meant to be
combusted and will leave residues.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.