OK to use 85W140 rather than 80W90 gear oil in a Super C parade tractor?

   / OK to use 85W140 rather than 80W90 gear oil in a Super C parade tractor? #1  

sixdogs

Super Star Member
Joined
Dec 8, 2007
Messages
12,539
Location
Ohio
Tractor
Kubota M7040, MX5100, L4300, Farmall Super C, JD 790
I know 80W90 is spec gear oil for my 1947 Super C Farmall but that was then and this is now. The tractor only gets used in summer parades for maybe 100 miles a year in the heat of summer. I'd like to use 85-140 to slow down leaks but not sure if I should and if it's a good or bad idea. Do others use the thicker oil and does anyone have any experience or thoughts on this?

Thank you in advance.
 
   / OK to use 85W140 rather than 80W90 gear oil in a Super C parade tractor? #2  

Norm W

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Joined
Sep 20, 2013
Messages
319
Location
Syracuse NY
Tractor
Oliver 70, Farmall A, Allis Chalmers C, VW Rabbit (repowered with a Geo engine} tractor/backhoe, Cat D4-7U
It should work OK as you won't be subjected to "Low" temps in the summer.
 
   / OK to use 85W140 rather than 80W90 gear oil in a Super C parade tractor? #3  

Cycledude

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Joined
Nov 26, 2020
Messages
845
Location
Rib Lake Wisconsin
Tractor
LS XR4155, Ford 6610, Ford 8n
Over 30 years ago I put new rear axels and seals in my 8N Ford along with 85-140 oil , it’s been working fine, about the only real difference I noticed is during cold winter weather it takes a while for the oil to warm up so the 3 point isn’t so slow.
 
   / OK to use 85W140 rather than 80W90 gear oil in a Super C parade tractor? #4  

LouNY

Super Member
Joined
Jul 4, 2015
Messages
8,724
Location
Greenwich, NY
Tractor
Branson 8050, IH 574, Oliver 1550 Diesel Utility (traded in on Branson)
The cold points are almost identical on the two lubes, untill it gets worked and the oil temp starts to increase the viscosity will stay low
 
 
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