Drinking oil

[Audidothat]

I reset the mileage counter when I last put a litre of oil in and she has drunk it in 390 miles!!!! Warning came on again during this mornings commute.

Power delivery is down and she has been very 'lumpy' but I have also noticed a smell of oil in the heating system, I think some kind of breather or feeder pipe must be split somewhere, possibly putting oil into the air intake plenum and fumes are getting through to the heater matrix? Is that even a thing? Manifold flaps have been deleted and at the time the garage told me there are known cases of (litres) of oil getting into the manifold?

I topped up the power steering yesterday and there is no oil in either of the thick black air intake pipes.

Fault code for oil pressure and oil temp sensor is also showing on my code reader. I think it is the same sensor? Could it be showing a phantom level? I will check in a mo when the oil has settled.

Anyway going to book her in to my garage today but wondered if anyone had any predictions.