thank you, hoary, for your informative post.

Harry Krause
Date: 10/11/2004 10:44 PM Eastern Daylight Time
Message-id:

JAXAshby wrote:
So then you admit that single viscosity oils are superior


superior is incorrect.


to multi-vis
oils, with the exception of pre-lubing?


junnie, you are one slow learner. pre-lubing is the reason multi-grade
oils
were developed six decades ago, the reason multi-grade oils are by far the
oil
of choice, the reason virtually all engine manufacturers recommend
multi-grade
oils going on a quarter century.



Wrong.

The thing you are all ignoring is a car may start up at 0f or colder and they
will run a 210f thermostst, with the oil running hotter than that. In a boat
the thermostat is almost 100 degrees cooler (typically 120f on a 4s outboard
and I doubt most folks will start it at much under 65 or 70f.)
That operating range for the oil is a small fraction of what it is in a car.

"Gene Kearns" wrote in message
...
On 09 Oct 2004 23:34:23 GMT, (JAXAshby) wrote:


btw, race engine builders still use high price oil and still feel the
money is
well-spent even if you still don't understand why.


Why don't you address the issue. Why do they chose a single weight oil
over multi-viscosity oil?


My experience with race car crews (including the guys that build the
engines) is that they do a LOT of things based on folk lore and "that's just
the way it's done". Don't try looking for a lot of logic from racers, they
are more into superstition than science.

That said, racing presents an entirely different environment for the oil
than recreational or regular automotive. They aren't likely to get 3000
miles on an engine, so they aren't likely to care what the long term
durability of the oil is. What they do care about is how the oil reacts in
high RPM situations. A "racing" oil is formulated to reduce foaming, which
can be a critical issue on a high performance engine. You don't want to run
that in your car or boat, however, unless you intend to change your oil on a
weekly basis.

Rod

manufacturers of engine oil products all use sae specifications. this
is to mainly present a level playing field. when making, buying,
selling, choosing an oil product.
here is a website that explains how/why, buy the material, interesting
read.
http://www.sae.org/servlets/productD...D=J2227_200204

here is a website that the first is referring to "manufacturers specs"
omg its a marine company.

http://accessorycatalogue.penta.volvo.se/catalogue.asp

please dont let jax lead you through a conversation. his replies are
vitriolic and misleading.







(JAXAshby) wrote in message ...
so, ----------- which -------------------- major oil companies produce a
special "marine" grade oil?

Gene Kearns
Date: 10/11/2004 10:24 PM Eastern Daylight Time
Message-id:

On 12 Oct 2004 01:38:22 GMT, (JAXAshby) wrote:

so, which "additives" make oil work in an engine used to drive a propeller
are
not in oil in an engine used to drive a driveshaft?

Oh, mygawd, that is the first intelligent post you've made!!!

There may really be *some* hope!

Think carefully, now, auto vs boat.......

RPM?
Persistent Ambient Humidity?
Running Temperatures?
Ambient Temperatures?
Frequency of Use?
Etc.?

Think about it....

--



Grady-White Gulfstream, out of Southport, NC.

http://myworkshop.idleplay.net/cavern/ Homepage
http://www.southharbourvillageinn.com/directions.asp Where Southport,NC
is located.
http://www.thebayguide.com/rec.boats Rec.boats
at Lee Yeaton's Bayguide

Gene Kearns wrote:
On 12 Oct 2004 03:15:54 GMT, (Greg) wrote:


The thing you are all ignoring is a car may start up at 0f or colder and they
will run a 210f thermostst, with the oil running hotter than that. In a boat
the thermostat is almost 100 degrees cooler (typically 120f on a 4s outboard
and I doubt most folks will start it at much under 65 or 70f.)
That operating range for the oil is a small fraction of what it is in a car.


No, actually that was mentioned.... but Jax, of course, berated the
poster for mentioning it...




Frankly, if I espied Jax with tools in his and anywhere near a boat of
mine, I'd reach for the shotgun.

Gene Kearns wrote:
On 12 Oct 2004 00:24:58 -0700, (BenC) wrote:


manufacturers of engine oil products all use sae specifications. this
is to mainly present a level playing field. when making, buying,
selling, choosing an oil product.
here is a website that explains how/why, buy the material, interesting
read.
http://www.sae.org/servlets/productD...D=J2227_200204

here is a website that the first is referring to "manufacturers specs"
omg its a marine company.

http://accessorycatalogue.penta.volvo.se/catalogue.asp

please dont let jax lead you through a conversation. his replies are
vitriolic and misleading.


Don't I know. That is essentially why I told him to "look it up."
...which he won't, of course. He'll just post some oblique response
hoping "here we go again."

Funny thing is, it is my election whether we go or not... and that
drives him nuts....



When you decide not to, he'll declare victory. It's a characteristic...

JAXAshby wrote:
junnie, anyone who attempts rational discourse with you sooner or later
understands that if they shine a flashlight in your eyes they would see the
back of your skull. a vacuum has no characteristic called "rational".




On the scale of rationality, as it pertains to things mechanical, if 10
were perfect and 0 were you, Gene would be at the 8 mark. I'd be at the
4 mark.

keep up, Forrest.

Gene Kearns
Date: 10/11/2004 11:13 PM Eastern Daylight Time
Message-id:

On 12 Oct 2004 02:44:08 GMT, (JAXAshby) wrote:

So then you admit that single viscosity oils are superior

superior is incorrect.

to multi-vis
oils, with the exception of pre-lubing?

junnie, you are one slow learner. pre-lubing is the reason multi-grade oils
were developed six decades ago, the reason multi-grade oils are by far the
oil
of choice, the reason virtually all engine manufacturers recommend
multi-grade
oils going on a quarter century.


Ok, let's try this again.... *WHY* do racers elect to spend extra
money on single viscosity oils when multi-vis oils could be had much
cheaper??? Is there something you are neglecting to tell us???

--



Grady-White Gulfstream, out of Southport, NC.

http://myworkshop.idleplay.net/cavern/ Homepage
http://www.southharbourvillageinn.com/directions.asp Where Southport,NC
is located.
http://www.thebayguide.com/rec.boats Rec.boats
at Lee Yeaton's Bayguide

the engine under discussion was a mercruiser.

Gene Kearns
Date: 10/12/2004 7:27 AM Eastern Daylight Time
Message-id:

On 12 Oct 2004 03:15:54 GMT, (Greg) wrote:

The thing you are all ignoring is a car may start up at 0f or colder and
they
will run a 210f thermostst, with the oil running hotter than that. In a boat
the thermostat is almost 100 degrees cooler (typically 120f on a 4s outboard
and I doubt most folks will start it at much under 65 or 70f.)
That operating range for the oil is a small fraction of what it is in a car.

No, actually that was mentioned.... but Jax, of course, berated the
poster for mentioning it...

--



Grady-White Gulfstream, out of Southport, NC.

http://myworkshop.idleplay.net/cavern/ Homepage
http://www.southharbourvillageinn.com/directions.asp Where Southport,NC
is located.
http://www.thebayguide.com/rec.boats Rec.boats
at Lee Yeaton's Bayguide

so,
--------------------------------------------------------------------------
----------------- which
-------------------------------------------------------------------------
---------- one?


Gene Kearns
Date: 10/11/2004 11:14 PM Eastern Daylight Time
Message-id:

On 12 Oct 2004 02:49:25 GMT, (JAXAshby) wrote:

so, ----------- which -------------------- major oil companies produce a
special "marine" grade oil?

Try Google. You *might* learn something. Then again....

--



Grady-White Gulfstream, out of Southport, NC.

http://myworkshop.idleplay.net/cavern/ Homepage
http://www.southharbourvillageinn.com/directions.asp Where Southport,NC
is located.
http://www.thebayguide.com/rec.boats Rec.boats
at Lee Yeaton's Bayguide