Here are the specs for both fluids, 75w-110 and 75w-140. I honestly don't know what they mean, that's why I'm here to learn.
Kinematic Viscosity @ 100°C, cSt -- 20.4 / 25.7
Kinematic Viscosity @ 40°C, cst -- 143.7 / 185.6
Viscosity Index -- 164 / 173
Brookfield Viscosity @-40°C, cP --...