I have been looking myself and found that the 2003 lancer needs Mitsubishi Diamond ATF SP lll
Mitsubishi uses what is called Diamond SPIII ATF
The 2004 Mitsubishi Lancer has a 5-speed manual.
The 2005 Mitsubishi Lancer has a 5-speed manual.
The 2006 Mitsubishi Lancer has a 5-speed manual.
The 2002 Mitsubishi Lancer has a 5-speed manual.
The 2013 Mitsubishi Lancer has a 5-speed manual.
The 2012 Mitsubishi Lancer has a 5-speed manual.
The 2008 Mitsubishi Lancer has a 5-speed manual.
The 2011 Mitsubishi Lancer has a 5-speed manual.
The 2009 Mitsubishi Lancer has a 5-speed manual.
The 2010 Mitsubishi Lancer has a 5-speed manual.