![]() ![]() The graphic curve will be updated as well. All other values will be re-calculated automatically. x From the top half of the chart (grade 10W) this oil will have a cranking viscosity no greater than 7,000 mPas in a cold engine crankcase even if its. Below is a chart outlining the viscosity grades defined by SAE J306. Thin, low viscosity oils give better protection to engine parts at cold temperature. Engine oils naturally thicken as they cool and thin as they are heated. This eliminates spring and fall oil changes. A 5W-30 will flow easier than a 10W-30 at start-up temperatures and a 10W-30 will flow more easily than a 10W-40 at normal engine operating temperatures. The SAE 70W, 75W, 80W and 85W are for low temperatures, and the SAE 80, 85, 90, 110, 140, 190 and 250 are for the high heat applications. Just put your values (either imperial or metrical) in the appropriate fields below and press ENTER. The multi-viscosity-graded lubricants may be satisfactory at both temperature extremes. The use of any of the calculators’ results is at the user’s sole risk. In tropical weather, most OEMs still recommend multi-grade products, such as SAE 15W-40, because the lubricant flows faster through the engine than a pure SAE. Kinematic viscosity: 99.4 cSt at 40 C and 11.12 cSt at 100 C. The calculator below is for informative purposes only. A 5W viscosity grade requires the lubricant to flow properly at lower temperatures than, for example, a 15W viscosity grade, so it is expected to be used at lower starting temperatures. This comparative viscosity chart shows the relationship between the various viscosity grading systems (viscosities are related horizontally). effect of temperature on viscosity of the oil as per the parameters given below. You can calculate pre-filled values of oil classified by ISO 3448 with grades VG22, VG32, VG46 or VG68 (at viscosity Index = 100) or enter specific values for any other oils. See the ILSAC STANDARD FOR PASSENGER CAR ENGINE OILS chart on the next page for descriptions of current and obsolete ILSAC standards. Automobile manufacturers recommend oils that carry the API Certification Mark Starburst. These data is enough to determine kinematic viscosity at any other values of temperature and as well Viscosity Index. This mark cannot be applied to oils of the 0W-16 viscosity grade. For example, a motor oil that has a kinematic viscosity of 10.4 cSt at 100C will be classified as an SAE 30 grade oil since it falls within its viscosity range. the Viscosity Index (VI) by the formulas specified in ASTM D2270 (`Standard Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 and 100☌ 1`) or in ISO 2909 (`Standard Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 and 100☌ 1`) or in ГОСТ 25371-2018 (`Нефтепродукты.the kinematic viscosity values, depends from temperature, calculated by the formulas specified in ASTM D341 – (‘Standard Practice for Viscosity-Temperature Charts for Liquid Petroleum Products’).The interpolation calculator provided below is used to determine:
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