I was following the Bentley oil strainer thread and decided to poke around the web. Here's a perfect example where a tech replaced the oil filter on a Audi based V-8 Bentley Continental. We know these cars are quite pricey and of course the repairs bills mirror that.
This could have been prevented. Why? At 6:40 on the video you will find out. www.youtube.com/watch?v=5xrxjk1fmTQ
You must do your due diligence, not only with the modern era, but also with the classics. You can't teach stupidity folks. If you are thinking of purchasing a car you know nothing about, grit your teeth and get a factory trained tech to perform a lengthy inspection. If you cannot see ongoing maintenance invoices or perhaps you may be attracted to that shiny car on the auction site, think twice.
Experience is the best teacher