Excessive oil consumption is the engine telling you something is wrong. Like others have said most engines will, if filled to the maximum value vent the top quart fairly quickly and then the oil level will stabilize and reduction in oil level will reflect the actual oil that the engine is burning which is typically in the range of one quart every 5 to 10 hours. For the average Lycoming keeping the oil level at 5.5 to 6.5 quarts seems to be the magic number. On mine I add half a quart when the dipstick reads 6 Quarts, although it probably would not make any difference just to add a whole quart at the 5.5 mark.
Having said all that the problem with club or group aircraft is keeping an accurate oil log. So is the reason that the oil is low is because nobody bothered to add any in a long time, or is it because the engine is burning a lot ? That is the question. I suggest you talk to the engineer looking after the aircraft. If it is a group aircraft then perhaps you should get the group members together and have a discussion about managing oil levels and logging oil consupmtion.
Also while high oil consumption is not great, it is usually not indicative of imminent failure. What is indicative is a
sudden dramatic increase in oil consumption which is why logging oil added is important.
I once had an engine failure in a Piper Navajo shortly after max weight takeoff near dark from a short unlighted strip in the mountains. I had no choice but to go back and do a minimums NDB circle to land on one engine approach to get into the airport I had just left
It turned out that 2 pilots had put a total of 6
quarts of oil in that engine in the previous 4 hours of flying and could not be bothered logging the oil added, or telling me or maintenance
That engine was screaming that it had a problem but the two clowns flying before me were oblivious............