With my default vehicle, I managed 19.7 MPG (11.9 L/100 km) with a supercharged AWD V6 pessima coupe, driving pretty leisurely. I guess the supercharger really cuts into your mileage I got 21.6 MPG (10.9 L/100 km) without the supercharger, so it helped a little. It still has pretty short gearing, so I guess that isn't terrible. For the worst mileage, the T-series, with a 18.7L 2-stroke, pulling about 20 tons, got 3.24 MPG (72.6 L/100 km) You can practically still see the starting line. And for the best, I used the base Pigeon, and managed to get 58.3 MPG (4.03 L/100 km). You'll need a lot of patience to beat this one.
K4M you say? And K7J just for the sake of having 1 laying in the garage and one in a rusty post facelift mk1 megane begging for an oil change and not redlining it on cold engine every day sitting in front of my house Would make F7R as well, since I have that in my Megane, but I can't be bothered since the 2.0 DOHC from the old pessima is already quite close to it. One normal screenshot just so people won't complain that I'm constantly just talking about how shitty renaults are and why I want another one.