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