well I just had the mighty ea82 down too the short block new gaskets and seals but its still consuming a lot of oil. rear hatch is speckled with soot.

with the heads off I did the valve seals but cheeped out on doing the guides.  the guides felt ok but one exhaust valve was a bit tight.

I used my thumbs of steel to seat the valve seals and used the little plastic sleeve  when installing and used lots of lube.

could I have not seated the valve stem seals all the way ?  could the guides be so worn that new seals would not have helped ?

or could it be the rings?  there was a small step on the top of the bore ...

ea82 consuming about 1L for every 400 km

Probably rings.  

remove manifolds and check for oil past the guides. 

How is compression and any blowby?