[duke36]

see the viscosity chart; the Lubr. 299 may be closer to SAE 140. I spoke to Lubriplate rep's in the 1980's and they said this stuff could be used in straight cut gears in steam engines. We bought some 140 wt. gear oil in 5 gallons and use it in mid 30's cars that call for 160 wt. from the period. Note that we don't use it in hypoid rearends such as '37 and beyond Chrysler Corp. products.