official SAE viscosity specs, 5w20 vs 10w30 vs 20w50
#1
official SAE viscosity specs, 5w20 vs 10w30 vs 20w50
![](https://www.rx8club.com/attachments/series-i-tech-garage-22/129102d1226414676-official-sae-viscosity-specs-5w20-vs-10w30-vs-20w50-oil_viscosity.jpg)
i think i'm going to stick with the 20w50, at least given the climate of my area (southeast). and yes I know that the stuff I have highlighted are not the only important statistics on this chart.
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Interesting that just moving from a 5W20 to a 5W30 comes close to almost doubling the shear stability.
And the difference between a 10W and a 20W is only 10 degreesC (or about -18F colder) on low temp pumping viscosity.
And the difference between a 10W and a 20W is only 10 degreesC (or about -18F colder) on low temp pumping viscosity.
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