You may think that 20W50 is thinner than ()W gear oil. But here is a quote from
the VTR web pages: "Gear oil viscosity is measured at 150 F vs. 210 F for motor
oil. Therefore, 40 W motor oil is the same as 95 W gear oil. "
You can review the whole article here:
http://www.vtr.org/maintain/lubricants-redline.html#gear-oil
Vic Whitmore
76 Spitfire
Thornhill, Ontario
David Stewart wrote:
>
> Kirk's transmission mechanic recommended 20W50 motor oil for the tranny
> instead of hypoid gear oil? Somehow, 20W50 motor oil doesn't seem like a
> suitable replacement for 90W or multi-weight hypoid gear oil.
>
> Any comments from the experts?
>
> David Stewart
> Brewerton, NY
> 1980 Spitfire TFVDW2A5991838
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