As much as the fuel tanks it came with were designed to hold. It's not a universal thing. I've driven trucks which held as little as 70 gallons, and trucks which held as much as 300 gallons. For an over-the-road truck, 240 gallons seems to be pretty standard fare.
1/4 to 1/8th of a gallon, all factors dependent.
The current API rating for diesel engine oil is CJ.
An average 18-wheeler tanker can typically hold about 6,000 to 7,000 gallons of liquid. Since one barrel is equivalent to 42 gallons, an 18-wheeler tanker can hold approximately 143 to 167 barrels of water. However, the actual capacity can vary based on the specific design and configuration of the tanker.
Diesel #2. During the winter in the states that get regular temperatures in teens and below, you should use diesel #1 because diesel #2 will gell at lower temperatures.
1,000.000.
Depends on which engine it has.
Between four and nine, dependent on a number of factors.
300 to 650hp
22 to 25 tons, typically.
The norm will be between 22 and 25 tons.
In the range 2,000 to 2,500
18 wheeler has the higher gross weight