This is a fuel pallet which contains 700 Gallons of fuel (2649 liters). It is used to refill the Thunder Creek fuel trailer. This fuel 
is priced at $2.50 per gallon for red dyed fuel. According to my calculations it is 4 times cheaper than buying at the ingame fuel pumps 
which are priced per liter and end up approximately 4 times more expensive then this off road fuel can sell for.
You cannot fuel your vehicles directly from the pallet, it must be loaded into the fuel trailer first with a frontloader and pallet forks.
Diesel is required to operate your equipment. It is cheaper for you to by it in bulk than to buy it at the pump. And we all to want to save when we can.