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Re: Silkolene Pro 4 XP 10W60 ? [Re: kschachn] #5233582 10/08/19 05:56 AM
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Rmay635703 Offline
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Originally Posted by kschachn
Yes that’s precisely what was said. A “10 weight” is thinner than a “60 weight” right? So then he’s saying it gets thicker as it warms up.

Tell him he’s incorrect if he is, why tell me?


Would love to see the viscosity chart for this plotted with temperature

Re: Silkolene Pro 4 XP 10W60 ? [Re: Rmay635703] #5233674 10/08/19 07:36 AM
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kschachn Offline
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Originally Posted by Rmay635703
Would love to see the viscosity chart for this plotted with temperature

Would it be materially different than this? Isn't it about physics, not brand?

It doesn't look like a "10 weight" when cold to me.

[Linked Image]


1994 BMW 530i, 250K
1996 Honda Accord, 280K
1999 Toyota Sienna, 425K
2000 Toyota ECHO, 284K
Re: Silkolene Pro 4 XP 10W60 ? [Re: daz] #5243192 10/18/19 09:42 AM
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bonjo Offline
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As I understand 10w means at cold temps it’s viscosity is like a 10 sae and at hot temp like a 60 sae.
What im not sure is what is the actual w(winter) temp is

I have seen 10~60 oil lab led for off road bikes when you do a lot of crawling , idling and clutch slipping.
As other have commented,I think it’s ott for you bike

Last edited by bonjo; 10/18/19 09:44 AM.
Re: Silkolene Pro 4 XP 10W60 ? [Re: bonjo] #5243204 10/18/19 09:49 AM
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kschachn Offline
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Originally Posted by bonjo
As I understand 10w means at cold temps it’s viscosity is like a 10 sae and at hot temp like a 60 sae.
What im not sure is what is the actual w(winter) temp is

If that was the case the oil would thicken as it heats up, no oil does that as it would defy physics. Look at my graph above, what is the slope of the curve? When is the oil ever an SAE 10?

The winter ratings are determined at different temperatures based on which one is achieved.


1994 BMW 530i, 250K
1996 Honda Accord, 280K
1999 Toyota Sienna, 425K
2000 Toyota ECHO, 284K
Re: Silkolene Pro 4 XP 10W60 ? [Re: kschachn] #5243771 10/18/19 09:44 PM
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Bonz Offline
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The base oil is a 10 weight. The amount of viscosity index improver simply keeps that base oil from thinning out more or less depending on how much they add and they come about the second number that way.

A 10w60 is a 10 weight oil that doesn't thin out as much as it gets hotter. A 10w30 is a 10 weight oil that thins more relatively speaking. Oil doesn't thicken due to viscosity index improver when it heats up, only lessons the amount of thinning from whatever the base weight oil is.

Re: Silkolene Pro 4 XP 10W60 ? [Re: Bonz] #5244023 10/19/19 08:36 AM
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kschachn Offline
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So a 0W-XX oil is a 0 weight base oil?


1994 BMW 530i, 250K
1996 Honda Accord, 280K
1999 Toyota Sienna, 425K
2000 Toyota ECHO, 284K
Re: Silkolene Pro 4 XP 10W60 ? [Re: daz] #5244121 10/19/19 10:44 AM
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FastGame Offline
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popcorn2

Re: Silkolene Pro 4 XP 10W60 ? [Re: FastGame] #5244211 10/19/19 12:53 PM
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Bonz Offline
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If it a multi viscosoity oil and rated as a zero weight when it's cold, that's the base oil weight to my knowledge. Just like 10 weight is a base weight, 15 is a base weight and 20 is a base weight.

I think I see where you're going with this, how can a zero weight end up protecting like a 20 weight. You have to go elsewhere, that's above my pay grade. smile

Here is a pic which is the best I can do but probably doesn't answer the question.

Viscosity-Chart.jpg
Re: Silkolene Pro 4 XP 10W60 ? [Re: sunruh] #5245501 10/20/19 10:18 PM
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BusyLittleShop Offline
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Originally Posted by sunruh


10w means 10winter....as in flows like a 10weight in cold weather startup


Negative... as a dealer you should know that 10w is not a flow test to
simulate start up because oil don't flow much at minus degrees rather the
W is a API test where a cup of oil is stabilized to minus degrees and then
stirred by a magnet and the amount of milli amps it takes to move the
oil are recorded and compared to the chart below...


Quote Amsoil rep Dan Watson who knows what W measures in a 10W test...

"To test how oil will function in cold weather they don't flow the oil
because it would not flow through the orifice instead API takes a cup
and they fill it full of oil and lower it to the temperature required
they stabilize the temp to 0 degrees they set the cup on top of a
magnetic stirrer with a precision motor that turns the magnet. In the
oil is another magnet that magnet suppose to follow the outside magnet
the motor is connected to a precision milli amp meter which measures
amps in milli amps or 1,000 of an amp. the amount of current it takes
to turn the magnet in the cold oil is what is tested they set a range
on amperage if it will turn the magnet and draw 322 milli amps then
that qualifies as a 10w. to test for 5W they go down another 5
degrees and it stills has to achieves that amperage or lower. So what
are they really testing? the ability of the oil to lubricate a moving
part when its very cold will the oil actually allow the part to move
and not channel it can actually move in this cold oil and actually stay
a liquid if it actually does that they want to know hoe well it does
that the little precision motor will tell you how much energy it takes
to make the magnets turn that is a test of the resistance of moving
parts within the volume of oil. that is the trouble of cold oil can
you pump it? can you move it through gears can we get the oil to
move?"

"Does that mean its like a 10 weight oil? no they are so different
what API is measuring one measures real viscosity the other measures
apparent viscosity in a laboratory test."

"What the W test tells us is how well this oil function in winter of
cold weather the lower the W number the better it lubricates a 0W
will pump at the lowest temperature for oils right now whereas the
20w doesn't move that well."

"30 is your operational viscosity the 10w is how well it will do below 0"

[Linked Image]

Last edited by BusyLittleShop; 10/20/19 10:40 PM.

Larry L
Have a Wheelie NICE day
94 RC45 #2 58,000 on 30 Grade, Currently Mobil 1 5W30 SN
2002 Camaro Mobil 1 5W30
1952 De Havilland Chipmunk



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