Main Motorcycle: Striple!
Join Date: Sep 2010
Location: St Albans UK
10w 40. Semi synththetic if your bike has done less than 1k miles fully synthetic if it has done much more. Has to be certified api and Jaso ma.
Olive oil if you're Italian, Castor oil if you have a beard and are over 65, Amsoil if you wear stars and stripes clothing.
The manual will give you Triumph's current commercial partner.
If you use non motor cycle specific oil you're on your own save for the 47 people who will be along in a minute to tell you they use X, Y or Z and they are fine with it.
You have a Sprint ST so not sure why you are asking? Oil threads are so common perhaps a search might have kept you busy/interested for an hour or 12.
I've been out to the garage for you in temps of 3c so I hope it helps.
If it ain't broke, fiddle with it till it is!
I used to be young and foolish, I'm not young any more!