Did Acura stop making the RSX?
Yes, in 2006
In the United States, there is no such thing as a 2003 Acura Integra. 2001 was the last year of production. Afterwards, the name was changed to the Acura RSX - although it is still called the Honda Integra in other parts of the world. But to answer your question, the fuel capacity on a 2003 Acura RSX is 13.2 gallons.