I have one and don't know myself but if I had that question the best place to get an answer would be to call the dealer. Probably quicker and a little more trustworthy. If someone tells you 5 1/2 quarts and it's really only 4....well you're gonna be changing more than just your oil...
6 quarts
Seven qts with the 2.8 engine
11 qouets
06-07 Cts-V with the ls2 v8 takes roughly 6 quarts of full synthetic 5w-30. Mobil 1 I recommended
If its a 3.6 that would hold 6 quarts of oil. Preferably synthetic.
Yhu will be good wid about 2 or 2.5 bottles Jo
You need to know the engine size. Could be 6 quarts and it takes Mobil 1 Synthetic.
The 2008 Cadillac CTS has 24 valves.
The 2004 Cadillac CTS has 24 valves.
The 2006 Cadillac CTS has 24 valves.
The 2007 Cadillac CTS has 24 valves.
The 2005 Cadillac CTS has 24 valves.