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In the SAE J300 standard (2021), the viscosity grades are 0W, 5W, 10W, 15W, 20W, 25W, 8, 12, 16, 20, 30, 40, 50, and 60. [4] [1] In the United States, these numbers are often referred to as the "weight" of a motor oil, and single-grade motor oils are often called "straight-weight" oils.
Motor oil, engine oil, or engine lubricant is any one of various substances used for the lubrication of internal combustion engines. They typically consist of base oils enhanced with various additives, particularly antiwear additives , detergents, dispersants , and, for multi-grade oils, viscosity index improvers .
That same year new products were introduced, Havoline 10W-30, and Havoline Singlegrade. In 1968 'Improved Havoline & All Temperature Havoline' were introduced, followed by Havoline Super-Premium All Temperature Motor Oil in 1971. In 1979 Texaco ends the decade with a new product called Havoline Supreme 10W-40, which superseded Havoline Super ...
AMSOIL 10W-40 Synthetic Motor Oil became the first synthetic motor oil in the world to meet American Petroleum Institute (API) service requirements in 1972. [2] [1] The company created its tagline, "The First in Synthetics®," to acknowledge the achievement. Newspaper ad showing that AMSOIL synthetic motor was commercially available by 1968.
Both Rotella T4 15W-40 conventional and, Rotella T6 5W-40 and 15w-40 Synthetic both list the JASO MA/MA 2 standard; this information can be found on the bottle adjacent to the SAE/API rating stamp. JASO is an acronym that stands for Japanese Automotive Standards Organization. Note that the 10W-30 conventional oil does not list JASO-MA.
When a car manufacturer specified 10w-40 motor oil for its particular model of car. Can 5w-50 be used instead? The logic of it is 5w-50 supposed to be "better" than 10w-40 as it keeps its viscosity at higher temperature (the number 50) and has a "better" low temperature starting property (the number 5w) —Preceding unsigned comment added by ...