How often should I change the oil in my ex-rental Audi?

I have a 2010 Audi A4 diesel with approx 26,000 miles on the clock, which I purchased one year ago with 9000 miles showing from an Audi dealer, who advised me that it was an ex-rental car.

It has been serviced by Audi on a long life oil basis till now. Are there any reliability issues I need to worry about with regards to the DPF, the DMF etc?

Asked on 17 November 2012 by RH, Liss, West Sussex

Answered by Honest John
Addison Lee changes the oil in its fleet of Galaxys every 5000 miles and runs them up to 140,000 miles with no DPF trouble. I would change your oil and filter at least every 10,000 miles or every year, whichever comes first.
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