What oil weight
- Thread starter Larry_T
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KubotaBling
Silver Member
eather mobil or amsoil.. the only weights that meet CI-4 would be 5w30,0w40,5w40 and 15w40 the best bet probaly would be 0w40 or 5w40 since u said year round.. products would be mobil delvac 1 or amsoils 5w30 series 3000 would work. chevron has a 0w40 ci product too.
KubotaBling
Silver Member
difference in cranking and not.. and spinning a bearing and not in extreme cold.
Otherwise once hot nothing..
Otherwise once hot nothing..
RalphVa
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If you have to start your tractor at -40, use 0w40. If warmer than that, 5w40 would be fine. The lower the first number is, the faster the oil gets to your overhead valve train in cold weather.
Exxon did some research a few years ago (about 1990ish) where they showed an overhead cam engine being started at -40. The engines had transparent overhead valve covers for the camera to film how well the cam assembly was doing. Unless a 0w oil was used, the cam assembly would start smoking after a few seconds. It took several seconds for a higher weight oil to get pumped up to the cam assembly. The only oil available at that time that was 0w was synthetic. Our Canadian affiliate was looking at making a 0w30 non-synthetic at that time. Since then, EM and Chevron have non-synthetics that are virtually the same as synthetics, just made by a different route (and from less expensive feedstock than the true "synthetic" PAOs are made from).
Most wear occurs at startup. Almost all research has shown this, too.
Ralph
Exxon did some research a few years ago (about 1990ish) where they showed an overhead cam engine being started at -40. The engines had transparent overhead valve covers for the camera to film how well the cam assembly was doing. Unless a 0w oil was used, the cam assembly would start smoking after a few seconds. It took several seconds for a higher weight oil to get pumped up to the cam assembly. The only oil available at that time that was 0w was synthetic. Our Canadian affiliate was looking at making a 0w30 non-synthetic at that time. Since then, EM and Chevron have non-synthetics that are virtually the same as synthetics, just made by a different route (and from less expensive feedstock than the true "synthetic" PAOs are made from).
Most wear occurs at startup. Almost all research has shown this, too.
Ralph
raynman
Silver Member
301o,
Just my 2 cents, I'll be using the Amsoil series 3000
Just my 2 cents, I'll be using the Amsoil series 3000
slowrev
Elite Member
The all seem to weigh about 1 pound or so per quart.
Sorry just could not resist /forums/images/graemlins/smile.gif
Sorry just could not resist /forums/images/graemlins/smile.gif
Bird
Rest in Peace
</font><font color="blue" class="small">( The all seem to weigh about 1 pound or so per quart )</font>
Last I knew, a pint was 16 fluid ounces and a quart was 32, so make that 2 pounds or so per quart.
Sorry just could not resist. /forums/images/graemlins/smile.gif
Last I knew, a pint was 16 fluid ounces and a quart was 32, so make that 2 pounds or so per quart.
Sorry just could not resist. /forums/images/graemlins/smile.gif
BXMMCC
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A quart of oil - 32 ounces - is a fluid measure - volume. A pound - 16 ounces - weight.
A quart of water weighs about two pounds.
Gasoline weighs about a pound and a half per quart.
Lube oil is somewhere in between.
Fluid ounces have nothing to do with weight.
A quart of water weighs about two pounds.
Gasoline weighs about a pound and a half per quart.
Lube oil is somewhere in between.
Fluid ounces have nothing to do with weight.
slowrev
Elite Member
Correct you are fluid ounces have nothing to do with weight. So why is the viscosity of oil referred to as weight ? Just curious, anyone know ?
RalphVa
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A quart of oil is short of 2 pounds, because it is lower than the specific gravity of water.
Don't know why oil viscosity is called a "weight". I would have called it "wait". In the winter, in can be a long wait for a higher viscosity oil to flow. Some won't flow at all.
Ralph
Don't know why oil viscosity is called a "weight". I would have called it "wait". In the winter, in can be a long wait for a higher viscosity oil to flow. Some won't flow at all.
Ralph
BXMMCC
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More stuff than everyone doesn't need to know (from a Web page googled oil weight):
The way oil viscosity is measured is with a Saybolt orifice viscometer, which is basically a cup surrounded by a water bath which keeps the temperature of the oil sample constant. There is a plugged opening in the bottom of the cup, which is opened when the oil is at the proper temperature. The oil is captured in a 60ml flask and the amount of time required to fill the flask is recorded.
A SAE30 oil takes 58-70 seconds to fill the flask at 210F,
an SAE40 oil takes 70-85 seconds, and
an SAE50 oil takes 85-110 seconds.
There is also a test for low-temperature viscosity that is designated by a "W" suffix on the SAE viscosity rating.
A SAE5W oil takes less than 6000 seconds to fill the flask at 0F.
An SAE10W oil takes 6000-12000 seconds, and
an SAE20W takes 12000-48000 seconds.
I'd assume that the winter oil testing leaves the test engineers with plenty of time to relax while waiting for the test to conclude! Ah, the life of a petroleum engineer!
A "multiviscosity" oil is simply an oil that has been rated using both tests. Nothing magic about it, except that sometimes the composition of the oil has been tweaked to flatten the viscosity-temperature curve.
Note that a SAE30 oil and a SAE30W oil are not the same thing, as they are measured using different tests.
The way oil viscosity is measured is with a Saybolt orifice viscometer, which is basically a cup surrounded by a water bath which keeps the temperature of the oil sample constant. There is a plugged opening in the bottom of the cup, which is opened when the oil is at the proper temperature. The oil is captured in a 60ml flask and the amount of time required to fill the flask is recorded.
A SAE30 oil takes 58-70 seconds to fill the flask at 210F,
an SAE40 oil takes 70-85 seconds, and
an SAE50 oil takes 85-110 seconds.
There is also a test for low-temperature viscosity that is designated by a "W" suffix on the SAE viscosity rating.
A SAE5W oil takes less than 6000 seconds to fill the flask at 0F.
An SAE10W oil takes 6000-12000 seconds, and
an SAE20W takes 12000-48000 seconds.
I'd assume that the winter oil testing leaves the test engineers with plenty of time to relax while waiting for the test to conclude! Ah, the life of a petroleum engineer!
A "multiviscosity" oil is simply an oil that has been rated using both tests. Nothing magic about it, except that sometimes the composition of the oil has been tweaked to flatten the viscosity-temperature curve.
Note that a SAE30 oil and a SAE30W oil are not the same thing, as they are measured using different tests.
BXMMCC
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slowrev
Elite Member
All of the oil viscosity tests seem to deal with temp/volume/time. Where does the weight come in? Might have missed something though.
BXMMCC
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From the howstuffworks webpage:
The weights given on oils are arbitrary numbers assigned by the S.A.E. (Society of Automotive Engineers). These numbers correspond to "real" viscosity, as measured by several accepted techniques. These measurements are taken at specific temperatures. Oils that fall into a certain range are designated 5, 10, 20, 30, 40, 50 by the S.A.E. The W means the oil meets specifications for viscosity at 0 F and is therefore suitable for Winter use.
The weights given on oils are arbitrary numbers assigned by the S.A.E. (Society of Automotive Engineers). These numbers correspond to "real" viscosity, as measured by several accepted techniques. These measurements are taken at specific temperatures. Oils that fall into a certain range are designated 5, 10, 20, 30, 40, 50 by the S.A.E. The W means the oil meets specifications for viscosity at 0 F and is therefore suitable for Winter use.
slowrev
Elite Member
Thanks for the expanation on the "weight" thing. I sort of assumed that from scanning the article, but you know about assumptions /forums/images/graemlins/smile.gif
</font><font color="blue" class="small">( And for those who really are curious:
Oil weight )</font>
Very interesting. Thanks for the link.
Oil weight )</font>
Very interesting. Thanks for the link.
