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What is SAE 90 staight mineral oil?

Updated: 9/15/2023
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Wildeuce1

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14y ago

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'SAE' is an acronym for: "Society of Automotive Engineers" An international non-profit educational and scientific organization dedicated to advancing mobility technology.

They develop technical information on all forms of self-propelled vehicles including aircraft and disseminate this information through many channels, including oil specifications.

The number "90" is the viscosity (or thickness). 90 being a very viscous or thick "weight" oil. (90 weight would obviously be for special applications.)

"Straight" (or single), means that the viscosity is rated at a single non-winter temperature viscosity. Usually, the weight will include a "W" for "Winter" (as in 10W-30), rating that viscosity at 0 (zero) º degrees F.

And of course "mineral" is just that.... mineral oil ... Petroleum distillate.

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Q: What is SAE 90 staight mineral oil?
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