As the season draws to a close I am thinking about fluid changes in my new
to me boat. I have 1987 Mercruiser 260s and the manual recommends straight
30W oil. Why not a 20-40W or a 20-50W? The manual says that's ok if
straight weight is not available but it is not recommended. Can anyone shed
any light on this for me? Thanks.-DanO

You do not have the huge temperature differentials that cars have. Most of
the time you are in the 40-75 degree ambient temperature range.
Bill

"Dan Olstad" wrote in message
ink.net...
As the season draws to a close I am thinking about fluid changes in my new
to me boat. I have 1987 Mercruiser 260s and the manual recommends
straight
30W oil. Why not a 20-40W or a 20-50W? The manual says that's ok if
straight weight is not available but it is not recommended. Can anyone
shed
any light on this for me? Thanks.-DanO

bill, knock it off. straight weight oil takes many, many, many seconds longer
to flow to all pressure oil bearings in a just started, ambient temp engine
than does multi-weight oil.

straight weight oils are proper only for engines that are started with proper
care to prelube and brought up to temperature before putting a load on it and
are run for extended periods of time before shutdown.

bill, you don't have a clew what the paragraphs above mean, so just knock it
off and don't post again on oils.

"Calif Bill"
Date: 9/18/2004 10:04 PM Eastern Daylight Time
Message-id: . net

You do not have the huge temperature differentials that cars have. Most of
the time you are in the 40-75 degree ambient temperature range.
Bill

"Dan Olstad" wrote in message
link.net...
As the season draws to a close I am thinking about fluid changes in my new
to me boat. I have 1987 Mercruiser 260s and the manual recommends
straight
30W oil. Why not a 20-40W or a 20-50W? The manual says that's ok if
straight weight is not available but it is not recommended. Can anyone
shed
any light on this for me? Thanks.-DanO

Well jaxass, how come cars have successfully run for years with straight
weight? My Ford 351W in the boat calls for straight 30 weight. You again
show you are even dumber than asslicker and that is hard to accomplish.

"JAXAshby" wrote in message
...
bill, knock it off. straight weight oil takes many, many, many seconds
longer
to flow to all pressure oil bearings in a just started, ambient temp
engine
than does multi-weight oil.

straight weight oils are proper only for engines that are started with
proper
care to prelube and brought up to temperature before putting a load on it
and
are run for extended periods of time before shutdown.

bill, you don't have a clew what the paragraphs above mean, so just knock
it
off and don't post again on oils.

"Calif Bill"
Date: 9/18/2004 10:04 PM Eastern Daylight Time
Message-id: . net

You do not have the huge temperature differentials that cars have. Most
of
the time you are in the 40-75 degree ambient temperature range.
Bill

"Dan Olstad" wrote in message
link.net...
As the season draws to a close I am thinking about fluid changes in my
new
to me boat. I have 1987 Mercruiser 260s and the manual recommends
straight
30W oil. Why not a 20-40W or a 20-50W? The manual says that's ok if
straight weight is not available but it is not recommended. Can anyone
shed
any light on this for me? Thanks.-DanO

Around 9/19/2004 10:32 PM, Calif Bill wrote:

Well jaxass, how come cars have successfully run for years with straight
weight? My Ford 351W in the boat calls for straight 30 weight.


As does the Crusader 220 in my dad's Chris...



--
~/Garth - 1966 Glastron V-142 Skiflite: "Blue-Boat"
"There is nothing - absolutely nothing - half so much worth doing
as simply messing about in boats."
-Kenneth Grahame, The Wind in the Willows

Garth Almgren wrote:
: Around 9/19/2004 10:32 PM, Calif Bill wrote:

: Well jaxass, how come cars have successfully run for years with straight
: weight? My Ford 351W in the boat calls for straight 30 weight.


: As does the Crusader 220 in my dad's Chris...


As does my OMC 3.8 liter (manufacturer recommends straight 30W).

b.

Here's some info on mulitgrade Oil -- My father in law owned a Lincoln
mercury dealership for over 30 yrs. When I first started working for
him, part time. I watched as 30 new Lincolns came to the car lot via
tractor/trailer and getting unloaded. My father in law, stated. Joe,
drop the oil on each car, and fill with 20/50 oil (this was in the yr 1974)
I asked why ? is not the oil from the ford factory any good ??? he stated
yes the oil in them is good, (first reason) but if you want a quiet
Lincoln, you run 20/50 oil, (the second reason) my father in law, also
stated, from repairing engines, 20/50 in most climates will make the engine
run smoother, longer service, and less repair,other than (extremes like
Alaska) or South America

Now we notice, 30 years later (2004) most oil companies list 20/50 for
racing and extreame usage of a engine. I guess this info would also apply
to inboards

GM has been recommending 5w-30 since the mid 80's, and 10w-30 since the 70's.


Here's some info on mulitgrade Oil -- My father in law owned a Lincoln
mercury dealership for over 30 yrs. When I first started working for
him, part time. I watched as 30 new Lincolns came to the car lot via
tractor/trailer and getting unloaded. My father in law, stated. Joe,
drop the oil on each car, and fill with 20/50 oil (this was in the yr 1974)
I asked why ? is not the oil from the ford factory any good ??? he stated
yes the oil in them is good, (first reason) but if you want a quiet
Lincoln, you run 20/50 oil, (the second reason) my father in law, also
stated, from repairing engines, 20/50 in most climates will make the engine
run smoother, longer service, and less repair,other than (extremes like
Alaska) or South America

Now we notice, 30 years later (2004) most oil companies list 20/50 for
racing and extreame usage of a engine. I guess this info would also apply
to inboards

billie, you were told to stay out of any and all discussions re oil until you
bring yourself up to speed, and that will be at least a year of seriously hard
work for you.


Date: 9/20/2004 1:32 AM Eastern Daylight Time
Message-id: et

Well jaxass, how come cars have successfully run for years with straight
weight? My Ford 351W in the boat calls for straight 30 weight. You again
show you are even dumber than asslicker and that is hard to accomplish.

"JAXAshby" wrote in message
...
bill, knock it off. straight weight oil takes many, many, many seconds
longer
to flow to all pressure oil bearings in a just started, ambient temp
engine
than does multi-weight oil.

straight weight oils are proper only for engines that are started with
proper
care to prelube and brought up to temperature before putting a load on it
and
are run for extended periods of time before shutdown.

bill, you don't have a clew what the paragraphs above mean, so just knock
it
off and don't post again on oils.

"Calif Bill"
Date: 9/18/2004 10:04 PM Eastern Daylight Time
Message-id: . net

You do not have the huge temperature differentials that cars have. Most
of
the time you are in the 40-75 degree ambient temperature range.
Bill

"Dan Olstad" wrote in message
link.net...
As the season draws to a close I am thinking about fluid changes in my
new
to me boat. I have 1987 Mercruiser 260s and the manual recommends
straight
30W oil. Why not a 20-40W or a 20-50W? The manual says that's ok if
straight weight is not available but it is not recommended. Can anyone
shed
any light on this for me? Thanks.-DanO

First, you missed spelled Billy. And you will never get up to speed.

"JAXAshby" wrote in message
...
billie, you were told to stay out of any and all discussions re oil until
you
bring yourself up to speed, and that will be at least a year of seriously
hard
work for you.


Date: 9/20/2004 1:32 AM Eastern Daylight Time
Message-id: et

Well jaxass, how come cars have successfully run for years with straight
weight? My Ford 351W in the boat calls for straight 30 weight. You
again
show you are even dumber than asslicker and that is hard to accomplish.

"JAXAshby" wrote in message
...
bill, knock it off. straight weight oil takes many, many, many seconds
longer
to flow to all pressure oil bearings in a just started, ambient temp
engine
than does multi-weight oil.

straight weight oils are proper only for engines that are started with
proper
care to prelube and brought up to temperature before putting a load on
it
and
are run for extended periods of time before shutdown.

bill, you don't have a clew what the paragraphs above mean, so just
knock
it
off and don't post again on oils.

"Calif Bill"
Date: 9/18/2004 10:04 PM Eastern Daylight Time
Message-id: . net

You do not have the huge temperature differentials that cars have.
Most
of
the time you are in the 40-75 degree ambient temperature range.
Bill

"Dan Olstad" wrote in message
link.net...
As the season draws to a close I am thinking about fluid changes in
my
new
to me boat. I have 1987 Mercruiser 260s and the manual recommends
straight
30W oil. Why not a 20-40W or a 20-50W? The manual says that's ok
if
straight weight is not available but it is not recommended. Can
anyone
shed
any light on this for me? Thanks.-DanO