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What's an "induction service"?
They probably chuck the intake tube in the dish washer and whilst it's going they shoot carby cleaner at the throttle body from a few metres away to make it more exciting.
I had the Mitsi dealer in Dandenong try to up sell me this every service right from 10,000km I told him that if there was a build up that quick I am sure he would hear about it when I claimed on the warranty for a faulty engine, then asked them if they sold me a car with a faulty engine! He tried to tell me it was preventative maintenance. That said I know Mitsubishi that earlier GDI (same as SIDI) engines do suffer from coking on in the manifold but I am sure that with holden using technology that has been around for almost 15 years will have used a better system.
If you use alcohol fuels like e10 or e85 it'll clean up all the carbon deposits better than that stuff anyway.
That was my thought !
I thought i was in a russian brothel...