Amsoil change interval

[Hugh Hamilton]

Are you guys that are using Amsoil changing the oil at longer
intervals than before since Amsoil says that is one of their benefits?
In any case, what intervals are you using? I'm accustomed to
changing my oil every 3000 miles.
Which Amsoil grade is recommended for the GTS? The 10w30 or
20w50 ?

Thanks
Hugh