Run away. At 30k with a good running vehicle you don't need this service. It
is designed to clean money from your wallet. I suggest you re-evaluate your
opinion of the honesty of your local shop. They may be true believers in
this stuff, which makes them even more dangerous that someone who is just
trying to extort a little extra money out of you.

Ed

Sounds like a combination of injector cleaner for the gas tank, "carb"
cleaner for the throttle body, and a carbon remover for the intake
valves and combustion chamber. Seems like those things have their
place. I know I recently tried injector cleaner for the first time, and
it quickly fixed an engine miss after a cold start.

It does seem like if you get the same gas mileage as you did when new,
and your vehicle runs smoothly, it's not needed at this time.

"After about 30,000 to 40,000 miles, regular oil changes don't do
enough to clean the engine and remove the sludge that builds up on the
throttle body," said Rene Richardson, ACDelco vehicle care product
specialist. "The ACDelco fuel induction kit will help loosen those
deposits and remove the carbon buildup."

The fuel induction service kit - the latest addition to ACDelco's
newly expanded vehicle care product line - includes three products
that help eliminate potentially damaging deposits from the fuel system,
the induction system and the throttle body:

   * Fuel System Treatment, which is poured directly into the fuel
tank to clean the fuel injectors, intake valves and combustion chamber.
Using a 50/50 mix of fuel, this product can be run through the fuel
injectors by way of the fuel rail.
   * Throttle Body Cleaner that eliminates buildup on the throttle
body. The throttle body cleaner also lubricates the throttle plate
mechanism and cleans the idle air control bypass. Instead of mineral
oil, the lubricant contains ester oil, which leaves behind a film to
help prevent sticking.
   * Induction Cleaner which removes deposits from the front and back
of the throttle body butterfly, the intake plenum and runners and the
intake valves and combustion chamber without harming the catalytic
converter or oxygen sensor.

IF you are having a significant problem these services can be of help.
But if you are not having any problems it's just a waste of your
money.  A can or two of Chevron Techroline FI Cleaner in your gas tank
every 10K will go a long way toward taking care of these kinds of
deposit buildups.