I used to have a 50 gallon tank on a small truck back in the day. Even that was scary. Right now, I have a 100 gallon on a 1 ton heavy duty. Could not imagine going up and down hills at freeway speeds with anything less. Having more truck than load means the brakes, engine, suspension, and transmission are not being stretched to their limits every time you turn the key.
They who can give up essential liberty to obtain a little temporary safety, deserve neither liberty nor safety.
Benjamin Franklin 1775
Sell not virtue to purchase wealth, nor Liberty to purchase power.
Benjamin Franklin Poor Richard's Almanac1738