Ribbed V Belt / Serpentine belt replacement

[07S6]

At my last oil change (93K miles), the tech noted that my serpentine belt is starting to wear. I've already replaced the front supercharger belt when i did the single pulley upgrade.
Audi maintenance schedule says to check/replace (ribbed V belt) if neccess at 75K miles. Is that the same as serpentine belt?
Curious - for those with 3.0T, what has been your experience with replacement mileage for that belt?
Looks like spark plugs are to be changed at 115K, once you've done the first replacement at 55K so i'm prob good for a while there.

Thanks-

[gk1]

At my last oil change (93K miles), the tech noted that my serpentine belt is starting to wear. I've already replaced the front supercharger belt when i did the single pulley upgrade.
Audi maintenance schedule says to check/replace (ribbed V belt) if neccess at 75K miles. Is that the same as serpentine belt?
Curious - for those with 3.0T, what has been your experience with replacement mileage for that belt?
Looks like spark plugs are to be changed at 115K, once you've done the first replacement at 55K so i'm prob good for a while there.

Thanks-

The 3.0T has two belts.
According to Audi the supercharger belt is to be replaced every 55k miles regardless of condition.
The other belt (alternator, A/C, water pump) is the check/replace as necessary at 75k miles.
On my '14 SQ5 I had the serpentine replaced with the water pump at 64k miles so I'm not a good example of lifetime of that belt. Although to my eye it looked perfect prior to replacement...no cracks etc.

Spark plugs are as you pointed out at 55k, then every 60k or 6 years.

[Chris@EPL]

Tuned cars should be replacing the plugs every 25-35k miles.

[07S6]

Tuned cars should be replacing the plugs every 25-35k miles.

Thanks, Chris. That's pretty aggressive.. Is that your suggestion, regardless if stage 1 or 2?

[gk1]

Tuned cars should be replacing the plugs every 25-35k miles.

Any specific reason why? Runs richer and fouls quicker?

[Chris@EPL]

Tuned cars have always had more frequent replacement for spark plugs. These cars are very sensitive to plugs and can have the plugs go bad quickly.