[jsf721]

If I’m correct and the gas tank it 20.1 and assuming you will fill up at 18 gallons you would have to average 22 miles per gallon.

I am averaging 20.6 mpg in my 540ix M Sport. With 50/5o highway city driving. Also use Conforti 60 percent and sport plus when I want some fun.

I cannot see you getting 400 miles to a tank with an M5.

I drive 18-20k per year so I totally get the concern. I don’t want to fill up 3x a week.

It’s what crossed the RR sport off my list of Suv’s