The problem here is that you are from Quebec...... try using US gallons in your conversion! Your truck was designed by a Yankee.

Oh, and don't go by the MPG in the dash, it is based on US gallons too. It will be different then hand calculations by a lot. The litres per 100km will be right. I am still trying to figure out what is good mileage in litres/100km....

 

HI to figure out from litres per 100 km use this calculation

100 divided by the litres being used then times by 2.891

so if reads 15 per 100 go 100div15 equals 6.67 time 2.891 equals 19.2

so then you can figure what a good litres per 100 is.

 

I have a 34 gallon tank in mine

 

Metric conversion calculator

http://www.worldwidemetric.com/metcal.htm

 

Have the 32 gal tank in mines. Just filled up yesterday with DTE reading 30 miles and put in 29.18 gallons.