If you look at the specs of SUDT2 versus SUDT, SUDT2 is thinner.
SUDT Kinematic Viscosity @ 40° C, cSt 45.0 Viscosity @ 100° C, cSt 9.00
SUDT2 Kinematic Viscosity @ 40° C, cSt 37 Viscosity @ 100° C, cSt 8.1
For comparison Duratran Synthetic is 48.8/ 10, Amzoil is 53.7/9.8.
What is...