Differences between M1 HM and Rotella T5/T6

[iunderpressure]

What are the differences when used in a gas turbo flat tappet engine?

What are the differences between T5 and T6 besides weight and one is a snythetic and one is a blend?

 

[Audi Junkie]

The T5 and M1 10w-30 HM are similar in visc, but in a turbo engine, I'd prefer the M1.

In a normal Euro engine or domestic big block, the T5 should be more than ideal.