Castor and synthetic won't mix ?

[Tor Rasmussen]

Ok.
Here's the deal.
You've read all my fuzz about fuels, bla bla bla, which to get, lalala,
jadajada and so on.

Well, a guy at a LHS told me today:

"If you start your engine out on fuels containing castors and later on plan
on going to syntheticoil fuels, you will have to clean your engine carefully
before switching brand.
That is caus if any residents of castor is remaining in the engine and you
start on synthetic's a chemical reaction will take place and overall
lubrication of the engine will be very poor and you will be likely to
experience damaging the engine."

Hmmm, I thought.
How can then fuels be mix of like 80 synth and 20 castor ?
Is it a super-special-secret-russian-blending-formular ?

Is what the clerk told me true ?

[Ian McMillan]

Maybe because what the LHS bloke said was bollox?

Just a thought.

Ian

"Tor Rasmussen" <tor.rasmussen@tiscali.no> wrote in message
news:ZBkPa.15965$Kb2.820050@news010.worldonline.dk ...
> Ok.
> Here's the deal.
> You've read all my fuzz about fuels, bla bla bla, which to get, lalala,
> jadajada and so on.
>
> Well, a guy at a LHS told me today:
>
> "If you start your engine out on fuels containing castors and later on
plan
> on going to syntheticoil fuels, you will have to clean your engine
carefully
> before switching brand.
> That is caus if any residents of castor is remaining in the engine and you
> start on synthetic's a chemical reaction will take place and overall
> lubrication of the engine will be very poor and you will be likely to
> experience damaging the engine."
>
> Hmmm, I thought.
> How can then fuels be mix of like 80 synth and 20 castor ?
> Is it a super-special-secret-russian-blending-formular ?
>
> Is what the clerk told me true ?
>
>
>

[david]

> Is what the clerk told me true ?
>
>


No, of course not. Millions of engines are run on mixes and on different
fuels all the time. How many engines have you seen suddenly die at the
field where the bloke scratches his head and says " oh well, thats caus the
last fuel was synth but todays is castor. Buggered it see".

David

[Beav]

"Tor Rasmussen" <tor.rasmussen@tiscali.no> wrote in message
news:ZBkPa.15965$Kb2.820050@news010.worldonline.dk ...
> Ok.
> Here's the deal.
> You've read all my fuzz about fuels, bla bla bla, which to get, lalala,
> jadajada and so on.
>
> Well, a guy at a LHS told me today:
>
> "If you start your engine out on fuels containing castors and later on
plan
> on going to syntheticoil fuels, you will have to clean your engine
carefully
> before switching brand.
> That is caus if any residents of castor is remaining in the engine and you
> start on synthetic's a chemical reaction will take place and overall
> lubrication of the engine will be very poor and you will be likely to
> experience damaging the engine."
>
> Hmmm, I thought.
> How can then fuels be mix of like 80 synth and 20 castor ?
> Is it a super-special-secret-russian-blending-formular ?
>
> Is what the clerk told me true ?

Not exactly, but it's not exactly a lie either. If an engine has been run
with a pure castor fuel and it's still CLEAN inside, then switching to a
synthetic oil based fuel isn't a problem. Even an engine with SOME
castor/carbon build up will happily switch over, but if the engine's full of
castor varnish, then before the new fuel has had a chane to clean off the
crap, the engine CAN be shagged, so it's good advice to strip and clean a
motor that's been previously runon castor, if only to be on the safe side
(and to avoid farting about with the mixture during the time it takes to get
all the old castor crap out of the motor)

He IS talking bollocks when he starts with the "chemical reaction" stuff
though, because, like you say, some fuels (most actually) have a percentage
of castor in them anyway.



--
Beav


Please note my E-mail address is "beavis dot original at ntlworld dot com"
(with the obvious changes)

Beavisland now lives at
www.beavisoriginal.co.uk

>
>
>

[Tor Rasmussen]

Ok, so getting this fella to reccomend me a heli-fuel would be out of the
question.
Most likely I would end up with a 50% nitro and 5 % oil and reccomandations
to just use plenty of afterrun at the end of the day, and everything would
be just fine.

"david" <david_perry@btconnect.com> wrote in message
news:bekm3m$2vl$1@hercules.btinternet.com...
>
> > Is what the clerk told me true ?
> >
> >
>
>
> No, of course not. Millions of engines are run on mixes and on different
> fuels all the time. How many engines have you seen suddenly die at the
> field where the bloke scratches his head and says " oh well, thats caus
the
> last fuel was synth but todays is castor. Buggered it see".
>
> David
>
>

[Mark Derbyshire]

Tor Rasmussen came forth with the following in rec.models.rc.helicopter

>
> Well, a guy at a LHS told me today:
>
> "If you start your engine out on fuels containing castors and later on
> plan on going to syntheticoil fuels, you will have to clean your
> engine carefully before switching brand.

Bollocks is what he is talking. Just run the engine with the new fuel and
you'll have no trubs[1]

[1] Apart from the retuning of course :0)

--

Mark
ZX12R-B1
Hiribo Shuttle
Morley F1-60 Max

[Dave Fox]

Having seen many boats run on 50% or 60% with castor oil. I can say that
what will more than will likely happen is all the crap that has built up in
the cylinder will get flushed out by the synthetic that can cause ring and
cylinder scoring. Synthetics are a very efficient solvent when it comes to
keeping the engine clean. I do not run fuels knowingly with castor in them
for that reason. Strictly synthetics for me. Same goes for my 1998 GMC
Sonoma. Mobile 1 for me.

Kind of explains why engines that are lubed with synthetics only stay so
clean. Many hundreds of tanks will result in a residue that can be wiped
away. Most chain saw lubes are synthetic also. Same reason. Got a Stihl Saw
that has been cutting for 12 years. Looks like the day I bought it. A little
wear but no brown crap all over everything. I have been flying one way or
another since the mid to late sixties with Cox or other engines. Cox fuel of
the time was castor based. Black crap all over the piston. Run synthetics
through it and it will come off in big sheets. Clean off what you can first
to make sure. Sound reasonable?

Dave Fox

By the way, He is full of it.......


"Tor Rasmussen" <tor.rasmussen@tiscali.no> wrote in message
news:ZBkPa.15965$Kb2.820050@news010.worldonline.dk ...
> Ok.
> Here's the deal.
> You've read all my fuzz about fuels, bla bla bla, which to get, lalala,
> jadajada and so on.
>
> Well, a guy at a LHS told me today:
>
Snip.......

[Beav]

"Dave Fox" <davefox19@charter.net> wrote in message
news:vhbjgs50pgk613@corp.supernews.com...
> Having seen many boats run on 50% or 60% with castor oil. I can say that
> what will more than will likely happen is all the crap that has built up
in
> the cylinder will get flushed out by the synthetic that can cause ring and
> cylinder scoring. Synthetics are a very efficient solvent when it comes to
> keeping the engine clean. I do not run fuels knowingly with castor in them
> for that reason. Strictly synthetics for me. Same goes for my 1998 GMC
> Sonoma. Mobile 1 for me.
>
> Kind of explains why engines that are lubed with synthetics only stay so
> clean. Many hundreds of tanks will result in a residue that can be wiped
> away. Most chain saw lubes are synthetic also. Same reason. Got a Stihl
Saw
> that has been cutting for 12 years. Looks like the day I bought it. A
little
> wear but no brown crap all over everything. I have been flying one way or
> another since the mid to late sixties with Cox or other engines. Cox fuel
of
> the time was castor based. Black crap all over the piston. Run synthetics
> through it and it will come off in big sheets. Clean off what you can
first
> to make sure. Sound reasonable?
>
> Dave Fox
>
> By the way, He is full of it.......
>
Isn't that the case for most blokes who work in model shops though?

Most of them can talk the back legs off a donkey, but not many have a lot of
actual experience of "doing".


--
Beav


Please note my E-mail address is "beavis dot original at ntlworld dot com"
(with the obvious changes)

Beavisland now lives at
www.beavisoriginal.co.uk

[Dave Fox]

"Beav" <beavis.original@ntloxoworld.com> wrote in message
news:gWkRa.333145$fC.2450596@news.easynews.com...
>
> "Dave Fox" <davefox19@charter.net> wrote in message
> news:vhbjgs50pgk613@corp.supernews.com...
> > Having seen many boats run on 50% or 60% with castor oil. I can say that
> > what will more than will likely happen is all the crap that has built up
> in
> > the cylinder will get flushed out by the synthetic that can cause ring
and
> > cylinder scoring. Major Snip.....> > Dave Fox
> >
> > By the way, He is full of it.......
> >
> Isn't that the case for most blokes who work in model shops though?
>
> Most of them can talk the back legs off a donkey, but not many have a lot
of
> actual experience of "doing".
>
>
> --
> Beav
>
>
> Please note my E-mail address is "beavis dot original at ntlworld dot com"
> (with the obvious changes)
>
> Beavisland now lives at
> www.beavisoriginal.co.uk
>
> Ex-purts one and all!!!!!


Dave Fox

[Beav]

"Dave Fox" <davefox19@charter.net> wrote in message
news:vhcee2mhr07r27@corp.supernews.com...
>
> "Beav" <beavis.original@ntloxoworld.com> wrote in message
> news:gWkRa.333145$fC.2450596@news.easynews.com...
> >
> > "Dave Fox" <davefox19@charter.net> wrote in message
> > news:vhbjgs50pgk613@corp.supernews.com...
> > > Having seen many boats run on 50% or 60% with castor oil. I can say
that
> > > what will more than will likely happen is all the crap that has built
up
> > in
> > > the cylinder will get flushed out by the synthetic that can cause ring
> and
> > > cylinder scoring. Major Snip.....> > Dave Fox
> > >
> > > By the way, He is full of it.......
> > >
> > Isn't that the case for most blokes who work in model shops though?
> >
> > Most of them can talk the back legs off a donkey, but not many have a
lot
> of
> > actual experience of "doing".
> >
> >
> > --
> > Beav
> >
> >
> > Please note my E-mail address is "beavis dot original at ntlworld dot
com"
> > (with the obvious changes)
> >
> > Beavisland now lives at
> > www.beavisoriginal.co.uk
> >
> > Ex-purts one and all!!!!!

That's the one:-) (And for the Americans who haven't twigged that), it's
"Ex" as in "has been" and "Spurt" as in "A drip under pressure"


--
Beav


Please note my E-mail address is "beavis dot original at ntlworld dot com"
(with the obvious changes)

Beavisland now lives at
www.beavisoriginal.co.uk