It means that your 2005 Acura RL is due for an oil and oil filter change, general look over/inspection, and check tire pressures.
you can use 10w30 oil or 10w40 either one will work
PAG
5w 30
5w-30
SAE 5w20
5w-30 weight oil
5 quarts of oil
My book states that the oil capcity with filter is 4.5 US Quarts
Usually your oil needs changing. You have to reset the light yourself. Look in manual it will show how to reset it.
5w 20
The manufacturer recommends 10W-30 weight oil for the 2005 Ford Falcon. A heavier oil can be used in extreme climates.