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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.
By the mid-1980s, recommended viscosities had moved down to 5W-30, primarily to improve fuel efficiency. A typical modern application would be Honda motor's use of 5W-20 (and in their newest vehicles, 0W-20) viscosity oil for 12,000 kilometres (7,500 mi).
9 Μαρ 2023 · What is 0W-20 Oil? 0W20 oil is considered low viscosity and is often chosen for its cold-weather performance. The 0 indicates that it will flow better when the temperatures dip than the comparable 5W oils.
The main requirements for an engine oil are defined temperature-viscosity properties, protection against wear and corrosion, keeping the engine clean, holding particles like soot or abrasives in suspension, yield strength under compression and many more.
In practical terms, oil viscosity affects engine start-up by determining how quickly oil reaches vital parts in colder conditions. Thinner oil, like 5W20, flows faster, reducing friction and wear during start-up and also improving fuel efficiency by reducing engine drag.
27 Οκτ 2021 · 5W-20 oil is a popular multigrade oil known for its excellent start-up performance in cold temperatures and engine protection properties. But should you be using 5W-20 oil? Let’s examine 5W-20 oil in detail, including what 5W-20 means, how it differs from other viscosity grade oils, and if it’s suitable for high mileage cars. This Article Contains:
9 Ιουλ 2018 · Learn about motor oil weights like 5W-20 and 10W-30. Understand viscosity ratings, cold weather performance, and how to choose the right oil for your vehicle.
