"Camilo" wrote in message ...
"trainfan1"

As far as I'm aware of, most string trimmers, saws, blowers, etc.
require TCW-3 oil. I've never used anything else either... what oil are
you talking about? The pre-diluted brand-specific (Homelite, Poulan,
etc) tiny little doses?

I run all my 2 stroke lawn/garden equipment on TCW-3 mixed at 32:1 for
longevity... had to free up the rings on my Homelite trimmer once in 12
years, it still runs as new...

Rob

While I'm not claiming it makes a *meaningful* difference, there is
supposedly a difference between the oils made for 2 stroke watercooled (e.g.
outboard) and 2 stroke air cooled (e.g. weedwhacker, chainsaw). The air
cooled engine, I've been told, runs hotter than the water cooled engine,
therefore different requirements for the oil. That said, I generally run my
outboard engine oil in the weed whacker.

I never got a straight answer as to why from Bombardier/Rotax, but
their PWC engines (at least of the late 90's vintage I own, specify TC
rated oil, not TCW3. In fact there is clearly printed label right the
oil reservior fill that say "Do not use NMMA ashless oil." Rotax's
private label is low-ash and is not NMMA TCW3 rated. But you can buy
TC rated oil, regular or synthetic, at motor cycle shops.

Only bring this us because these are unusual. As far as I know, Rotax
was the only "marine" engine make out there that said DONT use TCW3.
Though I think it comes from their PWC engines being ramped up version
of their ultralight engines with water cooled heads.

With all that said, I know A LOT of people that have run ashless TCW3
in Rotax engines without any trouble. I run sythetic TC rated oil in
mine and the primary benefit is reduced smoke.