60,000 is a bottom estimate that makes sure it doesn't break on you. You should be able to go to 100,000 but it's like anything else, no garuntees. Has it had any oil on it from the valve cover? How hard do you drive it? The older it get, the harder the rubber and hard accelerations can strip the teeth. Somewhere between 80 and 100 it should be done. After 100 it will at some point leave you stranded.
The Ford Mustang does not have a timing belt, it has a timing chain that should last the life of the engine and requires no maintenance.
Mustang's have timing chains not belts and do not have interference engines. Change the timing chain when it brakes or stretches to the point it throws off your valve timing.
The 2003 Ford Mustang does no have a timing belt, it has a chain which requires no maintenance. Replace the water pump when it starts leaking. It should last 100,000 miles or more.
The Mustang V6 does not have a timing belt it has a timing chain which normally will last the life of the engine.
I'm not a mechanic / technician but as far as I know there is no scheduled timing CHAIN change on an engine like there is on a timing BELT
The 3.8 liter V6 engine has a timing CHAIN
Timing chains are designed to normally last the life of the engine and are replaced during a complete engine rebuild.
The 3.8 liter V6 engine has a timing CHAIN
The 4.0 L - SOHC - V6 Ford engine has ( 3 ) timing chains
It's a timing chain -- needs only limited adjustment. Lasts a really, really long time.
If it is noisy, the engine timing is hard to maintain, or the engine is performing poorly, it may need changing. Timing chains are very durable and usually last the life of the engine or until it needs an overhaul.
The 3.8 liter V6 engine in a 1996 Ford Mustang has a timing CHAIN