The higher the VI, the more stable the viscosity across a range of temperatures (more desirable). from what I've seen, toyota lf 75w is 10.cst at 100 centigrade and 120 cst at 40 degrees, with a viscosity index of 185. oils, as well as Mobil 1 and Castrol Syntec 0W-30. Temperatures from 0C / 32F to ~ 50C / 122F (the data on the web page goes up to 80C). If you use the more complicated form, you can calculate . Download to read offline. An RC 5W-30 must have and HTHS of at least 2.9 but less than 3.5. U is the viscosity of your oil at 40o ie (416 cst in your case) L is the VI of reference oil having VI = 0 ie (You will get this from ASTM D2270 table) The calculator on this site is for informative purposes only and we make no claims as to the accuracy, completeness or fitness for any particular purpose of the results produced by our calculators. Plugging the 40C and 100C viscosities from the product data sheets into the Widman Oil operational viscosity calculator to get operational viscosities at a balmy 0C (32F): G = exp (37.4619 192.643v), and. They normally have a dial or switch on the fill "thingy" to switch between oils; or use different ones for different oi. So just for fun, I ran the following through Widman's viscosity graphing program using the following: Mobile 1 Extended Life 10W-60 Representative SAE 10W-30 example from Widman Shell Rotella T 15W-40 (pdf) Valvoline VR-1 Synthetic Racing Oil 10W-50 Pdf) Gray horizontal line on the chart roughly represents a range of 9 to 15 cSt (kinematic . So, an LSPI preventing oil. Viscosity - This is a measure of a fluid's tendency to resist flow. The higher the viscosity, the higher the fuel consumption, engine temperature, and load on the engine. Physics Investigatory Project on Fluid Mechanics. the fluid becomes more liquid. Site is running on IP address 104.244.127.208, host name ded3638.inmotionhosting.com (Los Angeles United States) ping response time 18ms Good ping.. Last updated on 2022/07/03 The most important aspect of an oil is its viscosity. All viscosities at 0*C were calculated using Mr. Widman's chart and should be considered as approximate as most lubricants do not behave as Newtonian fluids. https://www.widman.biz/English/Calculators/calc-visc-index.html 400 m/s, its surface area is [latex] 2. The expansion increases the production capacity on the X Series range to support the growing global VII demand. Basically the viscosity of an oil is dependent upon the ammount of 'viscosity modifiers' introduced to the base oil. Viscosity cSt (mm/s) @ 40C. But there is a very substantial difference in the operational viscosities of the oils at various temperatures and it's measured by something called their viscosity index (VI). Normally the data sheet gives us the viscosities at 40 C y 100 C, but you can insert any two temperatures and viscosities that you have. Also, the widman calculator is only extrapolating based on typical oil viscosity index parameters, so the data should be interpreted as "typical" rather than an exact representation of any given brand oil. August 22, 2022. So 10W is worth trying, or 32-34 cst, might be worth trying. 3- Select the temperature for the viscosity measurements. Temperature. Viscosity modifiers have greatly improved over the last few years, but apparently it's still very difficult to engineer a low HTHS/shear stable Resource Conserving oil. A synchromesh fluid usually refers to a specialized fluid that contains special friction modification additives for transmissions . The blue is Penrite HPR50 40w-70 and red is Redline HP 5w-30. Low Ca (-based detergents) 1900 instead of usual 2700ish. You can see clearly how the higher (442) viscosity Index of the Red Line Medium fork oil changes viscosity less at colder temp. Widman International SRL Interactive Conversion Programs and Calculators Here are a few practical calculators and converters where you can use real numbers to get the values needed. for the unknown oil: Y = cinematic viscosity @ 100 C and U = cinematic viscosity @ 40 C. You need two reference oils. A higher viscosity index (VI) is better because it means that at low temps the oil is closer to the desired running viscosity. The dependency of the kinematic viscosity on the temperature can be comparatively assessed by means of the viscosity index. But the rough starts are my primary concern because 1) all the 100C viscosity values of 0W20 oils are all about 8 cSt (thus similar viscosity at normal operating temps), 2) majority of engine wear is during the cold starts (or so I have read in various places), and 3) I'm making a general assumption that any good brand oil will provide . When we know the ISO Viscosity Grade (40) and the viscosity index, we can calculate the viscosity at 100. In the first module Insert: The viscosity at 100 Actually, unless the /5 fork has been modified, it is more prone to dive because it has more holes and with the shorter wheel base, once it starts to dive, the head angle steepens more and it dives more. A. ASTM D341 / Viscosity-temperature extrapolation. Education Technology. Kinematic Viscosity (at 40C, cSt): 85,2 mm2/s Kinematic Viscosity (at 100C, cSt): 13,9 mm2/s LIQUI MOLY Top Tec 4100 5W-40: . In other words, the viscosity-boost rate of OCP VII doesn't depend on the base-oil viscosity much but the viscosity-index-boost rate greatly increases with decreasing base-oil viscosity. I used the situation above. Multigrades meet both a winter and summer grade requirement using the exact same specifications as monograde oils and the grade label tells you which two. This thread although long does prove a great argument to use 5w-30 over 5w-20.. to quickly summarize that point, 5w-30 is more shear stable at higher temperatures than 5w-20.. Engine oil temps at least for me can heat up quick, and 5w-30 especially in the summer months provides the protection I desire for my new motor. That's just not true fapope. If we know the viscosity of an oil at two temperatures we can calculate the viscosity at the temperature we need in our operations. All lubricants are sorted by Viscosity Index from highest to lowest. Group III base stocks are mineral oil based and require viscosity modifiers to make the oil a multi-viscosity lubricant. ASTM D88 / Saybolt Furol viscosity. Information on the web seemed to be all over the place on fork oils in general. "Calculate" button To start over, click the "Clear" button Calculate the result of mixing two known oil viscosities Oil #1 cSt Oil #2 cSt Percentage of oil #1 Temperature 100 40 -5 C Result: Viscosity of the mixture cSt X-clean EFE 5w30 40C viscosity = 70.1 100C viscosity = 12.1 viscosity index = 169 HTHS = 3.5. The more resistance the liquid creates, the higher the viscosity. Viscosity cSt (mm/s) @ 100C. So please get it right. So I was going through some oil stuff and found this website that can calculate approximate oil viscosity vs temperature based on its viscosity index by putting in the 40 degree and 100 degree cSt value. The bottom line is that oil grade requirement cannot be totally separated from ambient operating temperatures. A project on the relation between the coefficient of viscosity and the SAE grading system of engine oils. You can then manually adjust the HTHS so that BO VI ~ 140 - 145 for Shell's PurePlus GTL base oil. Answer (1 of 6): SimpleYou can't. Even if you can manage to see in the room where there are (probably) 55 gal drums stored, you can't be sure which one your oil is coming from. . S znd j trust the excellence of ulx110 maintaining thousands of adelaide's subarus. . The dependency of the kinematic viscosity on the temperature can be comparatively assessed by means of the viscosity index. 226 SSU - 195 / SSU (4). Complete with a postulated equation to calculate the viscosity of a liquid at ant . For example SAE 15W40 oil meets the requirements for both grade SAE 15W and grade SAE 40. The oil viscosity needs to be about 3 cSt at 150 C to lubricate, when the oil is not at 3 cSt or colder or thicker you are preventing the oil from doing its job (most wear is at start-up, because the oil is too thick). Keep in mind that these tests are based on the high contact loading of the newer flat tappet engines beginning in the 1950s and particularly from the1960s-1980s. The best answer here is use what the manufacturer recommends, not what these sna Continue Reading FinanceBuzz Updated Jan 10 X-clean EFE 5w30 40C viscosity = 70.1 100C viscosity = 12.1 viscosity index = 169 HTHS = 3.5 The desired 30 wt (the 30 in 5w30) viscosity at operating temp is between 9.3 and 12.5. Calculate the Viscosity Index from Kinematic Viscosity. Slightly thinner 0w30 oil ran quieter in mine in winter so I was thinking of trying 5w20 synthetic (less concern about shear lowering viscosity vs dino oil). All Answers (6) for the unknown oil: Y = cinematic viscosity @ 100 C and U = cinematic viscosity @ 40 C. You need two reference oils. Many thanks to Richard Widman. Download Now. That's right it is the same. Jan. 19, 2014. Synchromesh Manual Transmission lubes we're developed specifically for manual transmissions and transaxles, and not for differentials or industrial gear boxes. Othets usr no less than motul or royal purple. All data except Viscosity at 0*C came from lubricant respective published data sheets. Good Noack 9.3. Good kinematic viscosity 100C, 14,4cSt, in the midst of the range for a Xw-40 (many -40s, these days, are on the lower edge, at 13,xx cSt) Excellent, low CCS (for cold starts) 5500. The VBN of the liquid mixture is then calculated as follows: \displaystyle \text {VBN}_ {\text {mixture}} = \sum_ {i = 0}^ {N} x_i \times \text {VBN}_i VBNmixture = i=0N xi VBNi. That is the input to get L and H from ASTM D2270 table. The "weight" the manufacturers specified sometimes didn't match the actual viscosity. 06-19-2009, 03:40 PM . the fluid becomes more liquid. Inland 45 permits strain-free cold starts as a result of its low pour point and high viscosity index (its viscosity is lower than that of typical vacuum pump oils at low temperatures). One with a VI of 100 and one with a VI of 0. It decreases with rising temperature, i.e. Viscosity desired. It indicates the rate of change in viscosity of an oil within a given temperature range. PS: Another thing you can try is to calculate the base-oil viscosity index BO VI in an online calculator such as Widman's using the auxiliary BO KV40 and BO KV100 outputs in the last two columns. As an example at a normal engine operating temperature of 100 deg C, a 0w/20 and a 5w/30 have the same viscosity of 10.4 cSt. 36 likes 49,452 views. Calculate the Viscosity at cSt @ 100C Viscosity Index: Viscosity cSt (mm/s) @ 40C : Viscosity cSt (mm/s) @ 100C "We have seen steady growth on the amorphous X series range of bale-form . A higher viscosity index (VI) is better because it means that at low temps the oil is closer to the desired running viscosity. Result: Percentage of second oil. Both must have the same viscosity as the unknown oil @ 100 C. H = cinematic viscosity @ 40 C of the VI=100 oil. Viscosity Viscosity is defined as the resistance of a fluid to flow. Calculate the Viscosity index of an oil when you know the viscosities at 40 and 100 It too is a PAO synthetic oil with a Viscosity Index of 186 and a viscosity of 12.2 cSt @ 100C. L = cinematic viscosity @ 40C of the VI=0 oil Some wax lyrical about the teflon content in nulon. Viscosity measurements must be at the same temperature for both oils. Standard practice for calculating viscosity index from kinematic viscosity at 40 and 100C Calculator for viscosity index (VI) according to ASTM D2270 and ISO 2909. Viscosity Index. Viscosity Index (VI) is reported to be 106. 1- Enter viscosity of the first base oil 2- Enter viscosity of the second base oil 3- Fill in the percentage (%) of the first oil in the blend. A comparison of the two oils (40w-70 and 5w-30) at a point of lubrication temperature of 350 deg F, indicates an actual viscosity of: 40w-70..6.7cSt 5w-303.6cSt The 5w-30 is marginal at best while the 40w-70 is a sludge at ambient temperature (579.2 cSt @ 80deg F) 9: 320 @ 100F N: Propane 0. At those temps, all oils are very thick relative to when they are warmer. The 0w30 however has a much lower viscosity on start up, and definitely helps cold starts . As mentionned in #1 above, to obtain "heavy" gear oil properties similar to that of the old 600W of the 1920's & 1930's, one has to obtain the ISO 680 Grade gear oil which has a viscosity cSt value at 100 degrees Centigrade of approximately 37 to 39.8 made by Shell Omala 680, Mobil 680, Chevron/Texaco 680, BP 680 etc., which as of today, come . It's almost the same viscosity index, and flow/kinematic viscosity/"flow" at 100 degrees as redline MT, but lower at 40 deg, so flows better. It's in 2 different scales (in *C) to show the full range from 0*C to 150*C. This is kinematic viscosity only so just the viscosity when sitting in the pan. Calculate the blend ratio of two known oils to achieve the desired viscosity. There is an acceptable "range" of viscosity, so while there can be a variance, is should not be significant. This should give a more consistent suspension at lower temps. Lubrizol - Viscosity modifier calculator tribonet - VI and viscosity caculators (2022) Widman - VI and viscosity calculators A2 size nomogram for viscosity index Applicable range of the above nomogram: This graph is designed for viscosity indexes between 0 and 100, viscosity of 2-20 cSt at 100 C, and 6.4-495 cSt at 40 C. But some swear by diesel oil. Innov Oil, a leading independent manufacturer of viscosity index improvers (VIII), has announced the completion of its 4KT plant expansion. If, for instance you had two basic hydraulic oils, one with a viscosity of 32 and the other of 68. The desired 30 wt (the 30 in 5w30) viscosity at operating temp is between 9.3 and 12.5. Then, the blend viscosity is calculated as, (2) where A12 is the . The SAE oil viscosity grades like 20, 30, 40 etc each correspond to a range of viscosity. All multi-grade engine oils use modifiers, or viscocity improvers (polymeric molecules that are sensitive to temperature). The kinematic viscosity of the mixture can then be estimated using the viscosity blending number of the mixture using the equation below. It decreases with rising temperature, i.e. One with a VI of 100 and one with a VI of 0. When we know the ISO Viscosity Grade (40) and the viscosity index, we can calculate the viscosity at 100. ASTM D2270 / Viscosity index (VI) from 40C and 100C. Both must have . In comparison, Amsoil 5W-30 has a VI of 176 and a viscosity of 11.3 @ 100C. Aug 23, 2021. As you can see the formula gets more and more complicated if we want to calculate accurately at low Z. Rheological properties of the prepared epoxides were measured at a temperature of 25-100 C, at a shear rate ranging from 5 to 300 s1. The Formula documents call for 5-weight fork oil, which isn't an accurate spec. This is a quick graph done with Widman's viscosity calculator. For example, an SAE Grade rating of 40 means viscosity at 100C can range from 12.50-16.29. H = exp (80.4945 400.468v). As viscosity is one of the critical parameters for potential biolubricant . Modules to calculate the Viscosity Index or the oil viscosity at 100C When we know the viscosity of an oil at 40C and 100C we can calculate its viscosity index. Splat Shop UK says the oil used by Formula is 3.47 centistokes (cSt) at 100 degrees C and 15.02 centistokes at 40 degrees C (which is about as hot as forks ever get). Widman International SRL Modules to calculate the Viscosity Index or the oil viscosity at 100C When we know the viscosity of an oil at 40C and 100C we can calculate its viscosity index. Looking at this graph and knowing that the engine is spec'd to run a viscosity of ~7 . You can use the viscosity-index calculator to see what happens to the viscosity index (VI), for example for a 20% OCP VII boost simultaneously in both KV40 and . Others have excellent oil sample analysis results for lowly i'expendive valvoline synpower out of a wrx. Widman International SRL Modules to calculate the Viscosity Index or the oil viscosity at 100C When we know the viscosity of an oil at 40C and 100C we can calculate its viscosity index. Please remember the Widman viscosity graph is not accurate much below 0C, nor at those temps are an oil's thickness what we care about. ASTM D88 / Saybolt universal viscosity. The volumetric flow rate is 0. Viscosity Index (VI) = ( (L - U) / (L- H) )x 100 In your case Viscosity of your oil at 100o is not clear. calculates the viscosity, 12, of the binary blend from viscosities and weight fractions of the components by introducing the so-called viscosity blending index (ASTM D7152), (1) where xi is the weight fraction, i is the kinematic viscosity of the ith component in the blend. Duoporta.com.This domain provided by openprovider.com at 2010-07-05T14:02:31Z (11 Years, 363 Days ago), expired at 2023-07-05T14:02:31Z (1 Year, 1 Day left). Widman International SRL Modules to calculate the Viscosity Index or the oil viscosity at 100C When we know the viscosity of an oil at 40C and 100C we can calculate its viscosity index. Result: Percentage of first oil. The calculator on this site is for informative purposes only and we make no claims as to the accuracy, completeness or fitness for any particular purpose of the results . An oil that falls within a given range of viscosity is assigned the . I did read the Haas article as well as the Widman Corvair article. The spec sheet for each product will show its viscosity index, or if it doesn't, you can use the viscosity at 40C and 100C in this calculator to discover the VI. In the first module Insert: The viscosity at 100 Most lubrication problems don't extend below 2 cSt, so I chose the simple form Z = v + 0.7, good down to 2 cSt. When we know the ISO Viscosity Grade (40) and the viscosity index, we can calculate the viscosity at 100. Kinematic viscosity 1 mm 2 /s at 40C Kinematic viscosity 2 mm 2 /s at 100C Result Monogrades meet the viscosity requirements of exactly one of the winter or one of the summer grades. Viscosity Index is an empirical number, that is it can be disproved or verified by experiment. Widman International Calculador Note the viscosities of of two oils and the percentage of the first oil you plan on using. When used oils are evaluated, it is desirable to change. ASTM D2270 / Viscosity index (VI) from free temperatures. If you set the temperature from 40C to 100C, the VI is a mathematical index that is repeatable, not a guess or estimation. Well first of all, 0w30 and 5w30 are the same viscosity at operating temp (that is, 30 weight). While. The oil's base stock plays into the lubricant's properties in terms of how it handles changes in viscosity and how well it can hold it. E Fork oil are evaluated, it is desirable to change ) viscosity at operating temp ( is! 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