Done that,oil pressure is very good.
Done cylinder compression check,thats very good.
Has a light top end rattle but most of them do,it's only the hydraulic lifters.
Light doesnt come on until the engine gets warm and you rev over 2krpm
from cold oil pressure is 45psi,then when it gets warm and you rev to 2k it drops to about 20-27psi fluctuating slowly.
Car was stood under a tree for a few months.Jonny did an engine flush with some crappy stuff so i got him to drop the oil again(CHANGE THE OIL FILTER THIS TIME!)
and do an engine flush with some decent stuff and run it up for a bit,which improved oil flow to the top end.But light still comes on.
My thinking is that there is a load of sludge in the oil pick up pipe and it wants the sump dropping and pick up pipe cleaning up.
Would be interested to know what other people think as it looks like im doing the job