Oil consumption

[Geoff Dowdle]

peterg,
that is massive oil consumption regardless of the 4 years since the rebuild .
Did any of the spark plugs foul during the long run ??
I suggest you inspect all the plugs to see their condition and oil content .
Check if they are all the same . A compression test is also worthwhile but not an indication of oil consumption

I'm my experience even one pint in 200 miles is more than excessive during a run in period.

It will not be the valves !!
I agree you should talk with the rebuilder as the engine will most likely need a total strip down .

Geoff D