i would get some good load under it a few times when out
as in up hill high gear low rpm
get the turbo pushing some boost as said around 10 psi in the engine

get the turbo working put dont go over the 4k revs

sitting at constant speeds on the motorway is not good for running in

town driving is good
stop start stop start but as i said get some good boost load on it to

just dont let it brake traction and wheel spin