4-8mpg of diesel depending on the year, condition, and modifications to the truck.
The average fuel economy of a semi truck is between 5 and 7 mpg when loaded.
Try this to find out your consumption
A fuel pump siphons the fuel through hoses.
5km per liter
Full Load - 3km per Litre
You don't. The fuel system draws from both tanks concurrently.
Who invented the Semi-truck?
There hasn't really been a brand of semi trucks recognized as the most fuel efficient. Since they run on diesel a more efficient fuel, semi trucks already are more fuel efficient than cars in terms of size and power.
No. Recent advance in technology do not require idling of a semi.
If the semi truck knocked on the garbage truck, yes.
30 L per hour
about 5-10 litres an hour does it get driven or left to idle