Hi guys thanks for all the advice
posted in the past.

well me and the guys at the maria were discussing oil.

Some use "marine" grade while others do not

Some use Valvoline strait 50 weigh "racing" oil

was wonder what every ones thoughts were?

Thanks
m

"Big gus" wrote in message
...
Hi guys thanks for all the advice
posted in the past.

well me and the guys at the maria were discussing oil.

Some use "marine" grade while others do not

Some use Valvoline strait 50 weigh "racing" oil

was wonder what every ones thoughts were?

Thanks
m




What does your engine manufacturer recommend? If cars are any sort of
analogy, I've heard some interesting stories from my mechanic about people
who used 50W "cause mah daddy said it wuz a good idea", only to find out
that there was a good reason why the manufacturer specified 5W30. "Good
reason" can mean an engine that's old before its time.

Big gus wrote:
Hi guys thanks for all the advice
posted in the past.

well me and the guys at the maria were discussing oil.

Some use "marine" grade while others do not

Some use Valvoline strait 50 weigh "racing" oil

was wonder what every ones thoughts were?

Thanks
m



For the rather minimal cost, & maximum protection, I use 5W-30 or 10W-30
Mobil 1 synthetic in the inboard. That engine is as clean as a whistle
and extremely quiet - the loudest noise with the exhaust under water is
a tie, with the belts going around the pullies, or the bubbles at the
transom.

Rob

I'm really not sure if the synthetic oil has to contribute to the
quietness of the engine.

maybe so.

I've always been leary of using a synthetic, because I don't have new
engines for one. and I've known of people to change to synthetic on
older vehicles with 90+ thousand miles, then complain because the
bearings are hammered out of the engine. I've always copnsidered that
the reason why is because with bearings with high milage already
"broken in" that they have an excess clearence in the tolorances, which
is fine with a 10 and even 5W motor oil, but when you throw in
synthetic, which initially is thinner than ATF, or water, the viscosity
isn't really changed with heat, but there is less oil pressure because
of the tolorances being opened up so the oil pressure drops.

Thats my view.



trainfan1 wrote:
Big gus wrote:
Hi guys thanks for all the advice
posted in the past.

well me and the guys at the maria were discussing oil.

Some use "marine" grade while others do not

Some use Valvoline strait 50 weigh "racing" oil

was wonder what every ones thoughts were?

Thanks
m



For the rather minimal cost, & maximum protection, I use 5W-30 or 10W-30
Mobil 1 synthetic in the inboard. That engine is as clean as a whistle
and extremely quiet - the loudest noise with the exhaust under water is
a tie, with the belts going around the pullies, or the bubbles at the
transom.

Rob

I forgot to add, that my Brother -in-law has bought several corvettes
in the last 10 years and they have come factory with Mobile 1.

But those are brand new engines.

If I put a Brand new or high quality reman in my boat, I'd probably use
Mobile 1 or Amzoil, but until then.........



wrote:
I'm really not sure if the synthetic oil has to contribute to the
quietness of the engine.

maybe so.

I've always been leary of using a synthetic, because I don't have new
engines for one. and I've known of people to change to synthetic on
older vehicles with 90+ thousand miles, then complain because the
bearings are hammered out of the engine. I've always copnsidered that
the reason why is because with bearings with high milage already
"broken in" that they have an excess clearence in the tolorances, which
is fine with a 10 and even 5W motor oil, but when you throw in
synthetic, which initially is thinner than ATF, or water, the viscosity
isn't really changed with heat, but there is less oil pressure because
of the tolorances being opened up so the oil pressure drops.

Thats my view.



trainfan1 wrote:
Big gus wrote:
Hi guys thanks for all the advice
posted in the past.

well me and the guys at the maria were discussing oil.

Some use "marine" grade while others do not

Some use Valvoline strait 50 weigh "racing" oil

was wonder what every ones thoughts were?

Thanks
m



For the rather minimal cost, & maximum protection, I use 5W-30 or 10W-30
Mobil 1 synthetic in the inboard. That engine is as clean as a whistle
and extremely quiet - the loudest noise with the exhaust under water is
a tie, with the belts going around the pullies, or the bubbles at the
transom.

Rob

wrote:
I'm really not sure if the synthetic oil has to contribute to the
quietness of the engine.

maybe so.

I've always been leary of using a synthetic, because I don't have new
engines for one. and I've known of people to change to synthetic on
older vehicles with 90+ thousand miles, then complain because the
bearings are hammered out of the engine. I've always copnsidered that
the reason why is because with bearings with high milage already
"broken in" that they have an excess clearence in the tolorances, which
is fine with a 10 and even 5W motor oil, but when you throw in
synthetic, which initially is thinner than ATF, or water, the viscosity
isn't really changed with heat, but there is less oil pressure because
of the tolorances being opened up so the oil pressure drops.

Thats my view.


This is from a website called Motor Oil Myths and Facts here is the
URL:

http://www.nordicgroup.us/oil.htm

One of the myths:

Thicker is Better Myth
The reason that oil viscosities have gotten thinner is because bearing
clearances have become smaller. Using thicker oils will interfere with
oil flow and the oil pressure will increase. In a worn engine it may be
okay to increase the viscosity of the oil because the bearing
clearances have become larger.

Anyway, pretty good site!

For diesel engines, it's tough to beat Delo 100 or Delo 400.
I use a single weight oil (30), because it's almost never colder than
50 degrees in the engine room when I start my boat. I also want as much
"oil" in my oil as possible, not all the parrafins and other junk they
add to runny, low viscosity oil to make "multigrade".

If you get lazy about following the recommended oil change intervals,
it's a bad idea to use a multigrade. All the viscosity improvers break
down over a period of time, and you are then left with only the lowest
number on a multi-grade oil. Pull the dip stick on an engine that has
gone way too long without an oil change at the black goo runs off like
dirty water.

But always follow the mfgr recommendation. If the builder says to use a
multi, use a multi- but be sure you also follow the recommended change
intervals or change even more frequently.

wrote:
For diesel engines, it's tough to beat Delo 100 or Delo 400.
I use a single weight oil (30), because it's almost never colder than
50 degrees in the engine room when I start my boat. I also want as much
"oil" in my oil as possible, not all the parrafins and other junk they
add to runny, low viscosity oil to make "multigrade".

If you get lazy about following the recommended oil change intervals,
it's a bad idea to use a multigrade. All the viscosity improvers break
down over a period of time, and you are then left with only the lowest
number on a multi-grade oil. Pull the dip stick on an engine that has
gone way too long without an oil change at the black goo runs off like
dirty water.

But always follow the mfgr recommendation. If the builder says to use a
multi, use a multi- but be sure you also follow the recommended change
intervals or change even more frequently.

Paraffin occurs naturally to some extent in oil. My uncle was an
aviation machinist and being before they added alot of junk to oil, new
the differences in amounts of paraffin in California, Texas, and Penn.
crude

Mercury's oil is 25-40 and doesn't have viscosity improving additives... so
I'm told. $25 of oil is a lot cheaper than a $4000+ engine replacement.
That's my 3 cents!


"Big gus" wrote in message
...
Hi guys thanks for all the advice
posted in the past.

well me and the guys at the maria were discussing oil.

Some use "marine" grade while others do not

Some use Valvoline strait 50 weigh "racing" oil

was wonder what every ones thoughts were?

Thanks
m

WOW and thanks for all the advice

another question

lets say we are using strait weigh 50 in the engine
this means it will be "50 weight" all the time

Now....

let say we also got 20W-50
this means its 20 weight when its cold and 50 weight when its 100
degree Centigrade

so ....

dos this mean the strait weight 50 and the multi weight 50 are the
same viscosity? ( given the multi weight is at 100 degrees?)


On Mon, 05 Jun 2006 06:19:08 -0400, Big gus
wrote:

Hi guys thanks for all the advice
posted in the past.

well me and the guys at the maria were discussing oil.

Some use "marine" grade while others do not

Some use Valvoline strait 50 weigh "racing" oil

was wonder what every ones thoughts were?

Thanks
m