These are the Vis Specs for the NEW Mobil 1 Extended Performance is this even possible? I couldn't get the rows lined up but you see what I mean The 5w30 is heavier than the 5w50.
SAE Grade 5w30 5W-50
Viscosity @ 100ºC, cSt (ASTM D445) 11.2 10.5
Viscosity, @ 40ºC, cSt (ASTM D445) 64.4 64.1
SAE Grade 5w30 5W-50
Viscosity @ 100ºC, cSt (ASTM D445) 11.2 10.5
Viscosity, @ 40ºC, cSt (ASTM D445) 64.4 64.1