junnie, you are more stupid than jeffies. At least he has a wife to keep from
acting like you.

use multi-grade oil, junnie. that is what the oil companies produce for your
engine, that is what the designers of your engine intended you use.

Gene Kearns
Date: 10/9/2004 8:19 PM Eastern Daylight Time
Message-id:

On 09 Oct 2004 23:47:03 GMT, (JAXAshby) wrote:

Sorry, but 15W-50 is not 15 weight in the winter and 50 weight in the
summer.... it never had a calendar.....

junnie, no one ever said that. what was said is the 15w-50 oil pumps like
15
weight oil upon engine startup at ordinary ambient temps

Not true. 15W does not equate with SAE 15.

(and thus pumps
pressure to all bearings needing pressure oil MUCH more quickly than 50
weight
oil would)

Most probably.... depending on temperature. (Be reasonable... don't
always assume a dry bearing at startup. Thin oil (multi-vis)will
drain from bearings, whereas thick oil will not.)

AND the film strength equivilent to 50 weight oil at engine
operating temps (which 15 weight oil would not).


Unlikely. Again, dependent upon temperature. 10W-50 and SAE 50
should offer the same protection at 100 degrees C(per ASTM spec.)... I
don't have any data to support your opinion at temperatures divergent
from the ASTM spec... do you?

junnie, it appears you are not all that familar why multi-weight oils were
developed nor why engine builders accross the board reccomend their use.


Jax, I know exactly why they were developed... I also know that not
ALL engine builders recommend their use (accross the board )(sic)....

Are there any disadvantages in using multi-vis oils? Warning, think
before you post... I have the answer and (as usual) supporting data...

--



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