I havent gotten my s4 yet but on the 17th its all mine. My question is what spark plugs should i get; denso, bocsh 4, or ngk. also what kind of oil 5w30, 10w40 ect. what do you guys use, also the car has 77,000 what else should i do to make it run like new. I'm going on a road trip on the 30th so i want to take my car and not have any problems. thanks

 

Make sure the timing belt has been replaced. If not, it's a pricey repair - get ready to shell out big bucks! It's necessary and you will be glad you did the repair. Make sure you get new OE or upgraded DV's, too.

The oil question is huge! Check the archives on this one. There are a few different schools of thought on this one. Mine will be there, too. Whatever you do, don't run with 10w40

The spark plug question is much like the oil question except that it really doesn't matter.

 

Id like to no about how much the timing belt will cost installed, at the dealer. also I found that the 1.8t guys like using 15w50 for driving hard. I'm gonna be driving real hard for the first few months so should i go with the 15w50? as for the plugs what kind are you using and are they better then the ones you changed out?

 

I use the stock plugs from Audi - no problems. Masny guys use aftermarket plugs with great results, too. It's up to you - check the archives on this.
Your choice of oil is good - especially if it's hard driving in hot weather. I use it in my S4.