Audi oil service pricing is as follows:  

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 Audi A3 , A4 , Q5 with 2.0 turbo   ---------------------------------------------------------------------------------$250

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 Audi A4 A6 3.0 V6 SC   ------------------------------------------------------------------------------------------   $250

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Regular oil services are the foundation of a happy, healthy engine. Your Audi may need to be topped up with oil in between oil services. 
Whether your Audi is just out of warranty or about to turn over 100k (or 200k), performing the Audi factory scheduled maintenance is key to keeping your audi running safely and reliably for many years to come.
Don't worry, this doesn't mean you'll be visiting your mechanic every 3,000 miles for an oil change -- those days are over. But unless you're a do-it-yourself mechanic, you'll want a relationship with an independent Audi mechanic who can perform these services to factory specifications while saving you hundreds of dollars compared to the Audi dealer.

 Audi's  will let you know when service is due, although, it is a good idea to familiarize yourself with the maintenance schedule.
Audi Oil service -  This service includes an oil change (with filter) and a safety check of your vehicle items including: brakes, indicator lights, rubber belts and hoses, engine coolant, steering linkage, and suspension components. Additionally, your technician will check for fluid leaks, wiper condition and wiper fluid level, check tire pressure, tread depths, check the horn, and dashboard warning lights.