A grade 68% is normally a C- or D+.
It is 68%.
68%
85% of your grade is a 68 and 15% is zero. 0.85 x 68 + 0.15 x 0 = 58, your final grade.
It equals to a D+
68% D+
68
D 60-69
No, use exactly what is recommended by the manufacture.
The numbers 68 and 46 in hydraulic oils indicate viscosity at 40°C. A 68-grade oil is thicker than a 46-grade oil, affecting flow and performance. Choosing the right viscosity is essential for system efficiency.
Lets say a D+ is approx. a 68. ((88.3*.8)+(68*.2))*100= 84.24%
Sae-20w