> Red Line 70W80 Gear Oil satisfies 30W Motor Oil requirements. That is
what I
> am using (the Red Line).......75W90 would seem to me to be
thicker.......(but
> then how is 70W Gear = 30W Motor
The Redline Gear Oil is a synthetic. It has the 70W80 viscosity properties
at the specified testing temperatures, but probably has a much different
viscosity versus temperature curve. Redline's suitability for use in
gearboxes should not be extended to assume any gear oil is suitable. A
"natural" gear oil [crude oil base] would be too viscous as noted.
Glenn C
1959 TR3A TS31684L [in total frame up restoration]
1960 TR3A TS64803L [driving, but needs work]
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