Making sure your car runs like it should!

refering to your owner's manual should be the first place to look, and yes there should have been more maintenance done.

at 50,000

Spark change if you drive hard
Belt change
Trans Fluid Flush and change
Rear Diff change
Coolant flush and change
Fuel system flush
bushing oil'd and checked

You forgot fuel filter too it last only 30k.

Absolutely nothing (most of the time)

Why? Because every few months im upgrading something on the car which usually requires that I drain all the fluids LOL. Seriously LOL, the turbo system allowed me to drain and fluch the radiator again, and do the power steering system. Also did the tranny fluid again at that point, and changed the fuel filter for the first time then (DIRTY).
Put in royal purple when we swapped gears to 3.73s @ around 13K (probably due for a change).

Im @ 64K right now, and only thing left to do is the braking system...and I really dont feel like doing that. Im sure its never even been boiled....heck im still on teh stock brake pads...and I have about 1/2 life left on them LOL. Im easy on the braking system Im alos pretty sure we repacked my wheel bearings @ 3X,XXX when we swapped to a tubular frontend.

So yea, I do maintenance when I do performance upgrades LOL.

SEAFOAM THAT FOOL

isjoining said:

refering to your owner's manual should be the first place to look...

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+1 Also a Haynes manual, while not gospel, is still a useful source of information.

mustang gt 2003 said:

I have 40,000 miles on mine, and have not changed or done anything else but oil changes. Should i do more maintainance to it?

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Right off the bat, you should replace your air filter and fuel filter, they are overdue. You should notice a significant improvement.