It is $4.499 per gallon this morning, it will probably be higher by this evening, but
4.499 x (38 main tank) and (74 in bed tank) = $503.89
Back in 1959 gas was around 30 cents per gallon, with gas wars at 19 cents per gallon. I do not remember ever seeing a diesel car or truck at that time except for big rigs.
Our original estimation of fuel costs for our trip was 3-4 thousand, now it is
$5,000. Oh well...