Hello friends !

Well, this last weekend, I did install my On-board computer in my Opel Corsa and drove about 250 km in a short trip to the beach.

I was driving in a very good road with a perfect asphalt. But, the road has some small declivity and some small ascent also.

When I´m driving at 90 km/h / 3500 RPM on 5th gear, in a very plain part of the road I can read a consumption of 14 / 15 Km / L (almost constant) - Normal for my small 1.0 L engine.

But, when in the same conditions I get a small declivity, the engine´s load is smaller so, the car´s ECU control the necessary amount of gasoline which is lower even if the speed and the RPM are the same. In this case I can read 20, 25, 30 km/l

In the other way, if I get a small ascent, the gasoline´s consumption gets really high and I can read something like 7 or 8 Km / L at the same conditions, since the engine needs to burn more gasoline to keep the speed.

I don´t know if it is right, but, I think it makes sense.

Regards !

Sérgio