well for sure get a good set of platinum plugs
I went with a set of MSD wires----- most on here will for sure tell you that the stock plugs and wires are just to get it off the dealers lot
and should be pulled and replaced as soon as you can--the sooner the better
I run a bottle of sea foam through my fuel system like every other month it helps keep the injectors clean as far fuel millage its not to good i get right at 21 and mine is like 90% interstate but it sure looks good sitting in the parking lot,,
how long will ti last is up for grabs pretty much like cathy said as long as you keep it maintained
With your tune up Id go for syntactic oil and a good wix oil filter but everyone is a little different on what they like
saddly it probably may not last as long as the escort them things are like cockroaches they just never die ( I have one whit 250,000 miles on it and it still starts and runs just not much body left
)