when the car is full with gas how many Kilometer should the car drive

Well, it all depends on how you drive to attain what miles per gallon you want. When was the last time you changed your plugs? Fuel filter, air filter? All these things come into play, even tire pressure.. How about what kind of gas do you use? the watered down junk? Or any no- ethanol? If these things are all done regularly you should get decent mileage at that point. Then it just depends on what kind of driving you mainly are doing, city/ highway/ a mixture? And your driving behaviors too. Also, things like idle time as well..

On full filling the gas I drove 300 KM IS IT NORMAL I have 281000 km I bought the car recently I am not sure about other things you mentioned like plugs ,fuel filter Gas I used The Normal one the cheapest on on the market driving almost city and some times mixture Okay but is that normal to have only 300 KM WITH FULL GAS THIS IS MY QUESTION AND WHAT ID I DID ALL THE TUNING WHAT I WILL GET

Mine is at 300000km and I get about 650 km on a tank of gas. I'm wondering it your gas tank has a leak in the tank

i have pontiac montana 1998 trans sport model full tank fuil i can drive 640 mixture with regular gas

i have pontiac montana 1998 trans sport model full tank fuil i can drive 640 mixture with regular gas and my van ir 368000 km it has