+1, a lot more action. 3 abreast racing and many bumps and nudges but without entire front wings being obliterated (or requiring replacement) and/or cars crashing. Oh yeah, lots of passing (at the front of the pack)!
If a Mercedes used about 90kg of fuel at the 2017 Abu Dhabi GP, its fuel economy was just under 6mpg US. 1 US gallon of fuel weighs about 2.83kg 90 / 2.83 = 31.8 US gallons used Race distance of 190 miles / 31.8 = 5.97 miles per US gallon.
Depending on temperature Gasoline's Specific Gravity varies between 0.71 - 0.77, hence a US Gallon will vary in weight from 2.689 - 2.916 Kgs, which gives a consumption spread of 5.68 - 6.16 MPG. Not bad in this modern world, as 2.5 - 4 MPG was the norm in the past, with larger displaced engines.