possibly you need a better grade of gas?
RICHFORTH LIMITED makes very loud ticking clocks.
It could be a sticking hydraulic lifter or valves that are slightly out of adjustment.
Most likely the ticking you are hearing is that from your solonoid. This is generally related with insufficient power from the battery.
Ford is the maker of the Mustang car.
ford make the mustang
If it makes the ticking sound and the engine will not crank, then either your battery is dead or the starter solenoid is shot.
The ticking noise could be worn out rocker arms under valve covers. Switch to heavier weight oil if ticking noise subsides that could be your problem. This is usually a sign of a high mileage engine. Worst case scenario would be weak oil pump not getting oil to top of heads.
Shelby
Ford....
yes, my 2000 grand prix gtp is losing power and makes ticking noise.
If you hear it only at idle and sounds faint, it is your rocker shaft. They wear on the end and makes a slight ticking noise. Mine has done it for over 100k miles and no problems. I hope you have done reg maint and kept oil changed.
Oil slow getting to the head