petrol

I'm looking to buy a 2017 T6 Caravelle to use for commuting about 250miles per week. I'm going to clock up the milage pretty quick and want the most reelable engine long term. I know I'll get about 10mpg more from a diesel but am thinking that a petrol engine may give better long term...

2018 T6 Caravelle. Put unleaded in diesel T6 and drove for 2km, now awaiting tow home. Can empty tank, filter, lines , what else should I do? How could I have been so dumb? Stevo