There are 2080 hours in a work year. If you earn $50,000 a year then 50,000/2080= $24.03 per hour.
In 1975, gasoline was selling for about $1.00 per gallon. I drove a 1967 Pontiac Bonneville that I bought from my Father. It was a 389 cubic inch V-8 with a 4 barrel carb and got about 8 miles per gallon in the city.
I drove the same distance to work then as I did today, round trip is 13 miles.
5 days of work= 65 miles @ 8 Miles per gallon uses 8.125 gallons of gas or $8.13 for gasoline for a week.
In 1975 I began working at Miller Brewing Company @ $11,800 a year or 11,800/2080= $5.67 per hour.
$8.13/5.67= 1.43 times my hourly wage, to drive to work for one week.
Last night I purchased $20.00 worth of gasoline@$3.39 per gallon, and my Mini-Van has a computer that tells me how many miles until I am empty or distance to empty (DTE). It is not precise but pretty accurate, for sake of illustration. When I started my engine my DTE was 146 miles (for $20.00 worth of gasoline). 146 miles/13 miles(round trip)= 11.23 round trips.
$20.00/11.23= $1.78 per day. (2008) 1.78/$24.03=
7% of my hourly pay in 2008.
$8.13/5= $1.63 per day (1975) 1.63/$5.67=
28% of my hourly pay in 1975.
28% - 7%= 21% more in 1975 than in 2008! Three times more!!
So, when gasoline reaches $10.17 per gallon (3 x $3.39) I will be paying equivalent to what I was paying in 1975! (roughly- give or take a buck or two but gas is still a deal. Someone posted that it cost $14.00 in the U.K.?)