Yes. And if you live in a warmer area (i.e. - southern or southwestern U.S.) it might actually be advisable.
The 2003 Toyota Camry runs on regular unleaded.
Toyota camry 6 cylinder
Extraguard ph4386
20W-50 Synthetic
10W30 5 quartz
It is important to know and use the correct the right engine fluid in a vehicle. The 2001 2.2L Toyota Camry uses 5W-30 engine oil.
Assuming that is a 2009 Toyota Camry XLE, it calls for 5W-30.
The correct fluid is listed in your owner's manual. Do not have an owner's manual then call your local Toyota dealer. Do not use any other fluid except what is recommended.
5W30. It's a good choice to buy fully synthetic oil.
Dexron III and compatible types.
10W 30 is generally best.
I believe that the oil needed is SAE 5w30, as is used in most vehicles.