Hey guys. I have made a couple of engines, the one that has the best economy weights around 850 kg, a lightweight. The engine is a 1.6 NA engine, with 241 hp. It uses 5.75 litres /100 km.
I then tried making a 1.2 liter with turbo and 105 hp, the car here ended up weighing 1200 kg ±, and going 5.9 liters / 100 km.
How far down have you been? The first of mine is ofcourse without any extra equipment etc.
i just went for maximum engine quality and minimum weight and i got around 1,4l/100km
it had a 20v 400cc i4 with 40 bhp the cars weight was around 500kg
With 0 quality sliders, 0.2l/100km (is a bug: when you create a engine with a efficiency of 0.xx-1.xx% with low power (for example, knocking the engine), you can had this values.