Chicago Land Truck Rental

I rented a truck from there once, the insurance is mandatory which is alright I guess. And they say "you dont need to fill up gas, we charge the same as the Citgo next door to fillup your truck when you return".
They claim that the 10 feet truck I used gives only 7 miles/gallon and charged me at least 5% higher for the gas than the Citgo.
I would advise you to fill up the gas on your own when you return the truck to avoid these additional charges.