feck burt !
wish i kept my mouth shut, I knew you wasnt blowing that much oil to lose the amount u was saying, u was leaking it out lol
it is leaking from inside the pump housing
only way to cure it is pump off and new seal
it is considered good practise to replace pump whilst your at it
it is chain off job or get the tool to replicate the water pump bolts to keep the chain in place
i had that leak and I didn't notice how much oil i was losing until the warning thing came up on my MID / TID
with the main seal, oil filter housing & water pump leaking i was getting through about a litre every month