I have had zero issues with the T6 (1year-18kmiles); in that time with my T5 I had had loads of issues.
So I wouldn't hesitate recommending it.
Petrol v Diesel,
If I was doing short journeys (cold engine), and low milage (mpg not so important); then maybe Petrol
If it was average miles with some larger journeys; then probably a 2wd, 150bhp Diesel. I am guessing but you are probably looking at 43mpg v 23mpg........... but that is a guess. It will be interesting to see how people get on with the TSi.
But on 25k miles per year that would equate to (@ average £1.15/l=£5.25/galon=£3000/year(diesel); £5700/year(petrol) over 5 years ownership = over £13,ooo extra in fuel..... Very Ball Park figures.
Higher resale of Diesel = Higher initial cost of diesel
If you need 1 egr valve and 1 dpf valve in that time cost to me would be zero with my 5 year warrantee.
If you need loads of egr valves ;dpf valves ;ad-blue valves; again cost to me = £zero, a pain in the ass but still zero
I honestly think these things are now a lot more reliable than they were with the T5, but time, and this forum will tell.
Still a no Brainer to me, if you take the extra warrantee Diesel all the way at this moment; even at 18k miles per year that would still be £9.5k saving over 5 years
When the T7 comes with hybrid technology;
or a 300-400miles range on battery only;
or even Fuel cell technology........... Then good bye Diesel for ever, until then.....