What did you do with your DII today?

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#9661

07-01-2024, 01:18 PM

Mntnceguy

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Quote:

Originally Posted by sqlbullet

I want to add a bit of clarity to the above. Temperatures are in C, not F. Perhaps long ago they were in F, but not now. The relevant standard is SAE J300. There are a bunch of parameters for a given rating, but the most static one is the Maximum Pumping Viscosity (cP) @ tempC. Also measured as key parameters are the cranking viscosity and the minimum viscosity performance at 100°C. And if you ever thought you knew the W was for weight...Not so much. "W"inter as in cold temp performance.

https://en.wikipedia.org/wiki/SAE_J300

Thanks to Mntceguy for prompting! I would have gone in in confident ignorance without his information.

Thanks for that! I appreciate the correction, seems I forgot which temp designation was used after all these years, but it does make more sense that it's in Celsius. The part that helped me over the years was to remember the first number is temp, and the second was oil weight or viscosity. I do seem to remember my instructors arguing over what the "W" meant back in the day, Winter or Weight, they never did come to an agreement, lol

Last edited by Mntnceguy; 07-01-2024 at 01:25 PM.

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