Never understood why Valvoline don’t just publish all their numbers.
Here is their data sheets which don’t include the -40c numbers
sharena21.springcm.com
sharena21.springcm.com
I’ve been looking at Valvoline gear oil as an alternative to Amsoil for cold temperatures application.
So I sent them an email and received a reply regarding the -40c brooksfield viscocity.
See below if you are interested:
Jeff, thank you for contacting Valvoline Product Support with your question.
We do not have the results for -20C since 75W does really callout -20C Brookfield.
Typical results as follows. This could change in terms of R&R and raw material property changes.
FS Gear Oil 75W-90 @ -40C – 91,000 cP
FS Gear Oil 75W-140 @ -40C – 107,400 cP
If you have any further questions, please feel free to contact us via phone at 800 TEAM VAL or by email at [email protected] for assistance.
Thank you and have a great day.
Zach
Valvoline Product Support
Thank you,
Valvoline Product Support
Ticket Number: 11-1990007
Subject: Brooksfield viscosity 75w-140 & 75w-90

Here is their data sheets which don’t include the -40c numbers
US_Val_FullSynLS_75W90_GO_EN.pdf - DocuSign CLM
US_Val_FullSynLS_75W90_GO_EN.pdf - DocuSign CLM
I’ve been looking at Valvoline gear oil as an alternative to Amsoil for cold temperatures application.
So I sent them an email and received a reply regarding the -40c brooksfield viscocity.
See below if you are interested:
Jeff, thank you for contacting Valvoline Product Support with your question.
We do not have the results for -20C since 75W does really callout -20C Brookfield.
Typical results as follows. This could change in terms of R&R and raw material property changes.
FS Gear Oil 75W-90 @ -40C – 91,000 cP
FS Gear Oil 75W-140 @ -40C – 107,400 cP
If you have any further questions, please feel free to contact us via phone at 800 TEAM VAL or by email at [email protected] for assistance.
Thank you and have a great day.
Zach
Valvoline Product Support
Thank you,
Valvoline Product Support
Ticket Number: 11-1990007
Subject: Brooksfield viscosity 75w-140 & 75w-90