I bought a petrol v6 for under 20k last year. 150k km SE with black leather. Have done just under 15k km in the first year of ownership. I have a thread on here with all my questions and is probably worth a read.
The V6 had a timing chain so no timing belt service required. From what people who have owned both have said the petrol is actually cheaper to own, because it's service costs are lower. 
It does hurt at the bowser sometimes tho...
Cheers
Dan
Thread is here
https://r.tapatalk.com/shareLink?url...9&share_type=t
Price vs Age - D3 or D4?
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