a 3.8 liter ( 232 cubic inch ) OHV - V6 ( if it is a GT - a 4.6 liter ( 281 cubic inch ) SOHC - V8 ) if its a mach 1 a 4.6 liter (281 c.i) DOCH - V8 If its a cobra a super charged 4.6 liter (281 c.i.) DOHC v8
The 2003 Ford Mustang has overhead valves (OHV).
the kind i use on ur mother ---------------------------------------------------------------------------------- The 2003 Ford Mustang owners manual shows ( 5 W 20 )
According to the 2003 Ford Mustang Owner Guide : ( DOT 3 brake fluid meeting Ford specification ESA-M6C25-A )
10w30
According to the 2003 Ford Mustang Owner Guide : ( DOT 3 brake fluid meeting Ford specification ESA-M6C25-A )
5W-20 ( according to the 2004 Ford Mustang Owner Guide )
My ( 1991 ) Ford Mustang 5.0 LX came from the factory with ( 5W-30 )
( 5W-30 ) according to the 1999 Ford Mustang Owner Guide
V6 Engine: 5W-30 V8 Engine: 5W-20
5W - 30 ( according to the 2000 Ford Mustang Owner Guide for the 4.6 liter V8 engine )
According to the 2003 Ford Mustang Owner Guide : ( Motorcraft MERCON automatic transmission fluid is used for the convertible top )
According to the 2003 Ford Taurus Owner Guide ( 5W-20 )