Everyday consumable goods in relation to general product viscosity in centipose cps water at 70 degrees f 1 3 centipoise cps blood or kerosene 10 centipoise cps. Viscosities can be related horizontally only viscosities based on 96 vi single grade oils.
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It is the measure of the flow or an oil at a given temperature iso viscosity test is taken at 40c sae viscosity test is taken at 100c or about 210f.
Sae 30 oil viscosity chart. In the market 5w 30 viscosity at 100c. This ensures that one brands 30 weight oil is the same viscosity as anothers. Iso are specified at 400c agma are specified at 400c.
I prefer spectros fork oils or suspension fluids. Also important to note there is a relatively tight range as to where the viscosities at 1000c of the majors fall. How do they come up with this rating.
Iso and sae are standardized specifications that define oil weight. Motor oil viscosity grades what does the sae viscosity rating on your motoroil bottle mean. Oil analysis basics viscosity viscosity this is the single most important property of a lubricating oil.
The actual viscosity grade of a lubricant is determined by the society of automotive engineers for example sae 15w40 for a multigrade oil and sae 40 for a monograde oil. Centipoise 10 15 20 25 30 40 50 60 70 80 90 100 120 140 160 180 200 220 240 260 280 300 320 340 360 ford 4 lemmer l034 191 10 12 14 15 16 17 19 20 21 22 24 25 32. As shown in the graph below the average viscosity for the 5w 30 major brands tested is 104 cst at 1000c.
In the early airhead days bmw fork oil at least for usa sold and serviced motorcycles was colored red was a military hydraulic oil. They are good have low stiction wide temperature range decent vi too and the viscosities can be depended upon. Most of the time when viscosity is explained words are used that are too technical for the average person to quickly grasp.
Sae viscosity grades for engine oils 1 sae j300 dec 99.
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