How much gas would I use weekly on a v8 Ford Mustang 2012-2014?

I've been wanting to buy a mustang but the gas usage has been holding me back, I'd like to know roughly how much I'd use a week. I drive 30km to work one way 6 days a week so roughly 400 km a week. Any ideas how much I'd be spending on gas?

How much is the price of fuel where you live and what is the EPA Combined MPG on the vehicle (look it up) then do the math.

If you drive it round the block once a week, not much.

If you drive 300 miles a day for a week, quite a lot.

Do you see the problem with your question?

I average 15.2 l/100 km with my 2014 GT, mostly city driving. How much stop and go you have in those 30 km will have a huge impact.