Viscosity (SAE)

Everything about SAE viscosity: what the numbers in 5W-40 mean, how viscosity affects cold starts and wear, and whether oil can be “too thick” or “too thin”.

16 articles in the section

Subsections

  1. Everything about SAE viscosity Part one of a long article on viscosity: what it is, and how to read the index and the SAE grade table. 7 articles: What is oil viscosity? What it's for How to decode the viscosity index Which viscosity is better for the engine?
  2. Viscosity: more or less? Part two: viscosity that's too low or too high, operating temperatures, clearances in friction pairs, and the eternal “5W-50 or 0W-30” question. 8 articles: Too-low oil viscosity Too-high oil viscosity Oil viscosity at working temperatures

Articles

  1. A few interesting facts about oil viscosity What oil viscosity means, two common mistakes (sporty oil for fast driving, the newest oil for an old engine) and what too low or too high a viscosity leads to. 379 words, 3 min Sponsored content

More on this topic