not enough oil?


Registered User
hi everyone,
I've done a service on my A6 3.0L tdi quattro and for some unknown reason it's not taken the 8.2 litres of oil as per manual.
i put roughly 7 litre in, started the car to let the oil filter fill up, then i topped up the oil to near the max mark on dipstick.
overall i used 7.5 litres.
i thought that after a few miles i would have to top up, instead after 3 days the level is still ok.
am i missing something or i made a mistake somewhere?
i have taken out just over 8 litres, so i don't know what's happening.
thanks for any input.