My Pathfinder is 10months old, with 19,000km. I average 375-400km to a full tank of gas. When I had an Infinity QX4 (2001), I averaged 450-475 to a tank. And from all my reading, it's the exact same product.

It's becoming frustrating, and need advise.

Thanks in advance.

Have a 2001 qx4 I drive average of 50/50 city/highway and get 425km on a tank at the most usualy 380-425kms. What is your city/highway driving mix and what was it on your Qx4?

gas mileage is tricky...it comes with old age...as long as the engine is running fine, then I would check tire pressure first.

I get around 325 - 360 city. But I still have twenty litres in my tank when I fill up and It's minus 35 celcius. My gauge will say empty but I can only fit 60 L. The owners manual says I have an 80 L tank.