Would this oil be ok for the lt80 ?

 

Can't see any reason why not. The LT80 came out in the 1980s and injects a fairly high ratio of oil to petrol, so any 2 stroke oil should be OK. The farmers round me usually use the same oil for the LT80 as the chain saw.

 

Thanks will try it

 

It should be fine.
Look on the bottle and see if it says "for injection".