Completely drain and cleaned out old oil.
Recon 50 mls is more like what came out, so in with near 3 bottles.
It's now a bit harder to turn by hand than it was before.
I recon it now a little louder cruising so presume bit more air being worked by fan.
Ambient air temp to cool to tell if its made any difference but next time vans hooked up will be the real test.