Sorry if this topic has been beat to death already but I am gonna throw this out there. I brought home my '09 GT a little over 2 weeks ago. I decided to change the oil right away because I didn't trust the salesman when he told me that the oil was just changed, along with the 144 point inspection. (yea right) I looked in the Pontiac owners manual and it said 4.5 qts with filter change. Then I checked the Toyota owners manual online and it said 4.0 qts with filter change. I changed the oil, dumped in 4qts drove to work (30 miles) and checked the oil before I left for home. I am reading about 1/8 of an inch above the upper dimple on the dipstick. I am curious as to what other 2.4l 2AZ-FE owners do. Do you use 4 or 4.5 qts?
Just for the record I use Mobil1 full synthetic and NAPA platinum filters on all my vehicles.