guys, what do you think of this? Possible alternative to Amsoil maybe?
http://lubrimaxx.com.au/resource/datasheet/420.PDF
http://lubrimaxx.com.au/resource/datasheet/404.PDF
http://lubrimaxx.com.au/resource/datasheet/420.PDF
http://lubrimaxx.com.au/resource/datasheet/404.PDF