[taxcontrol]

My quick math says at least $2,000 in gas. I’m thinking a round trip ticket would have been less expensive.

[Tax-chick]

I’m thinking a round trip ticket would have been less expensive.

But much less fun.

[Delta Dawn]

My only thought; Stupid is as stupid does.

If he tries driving back, it will not end well.

[castlegreyskull]

Doesn’t the gas change as you head to Brazil? I thought they have different levels of ethanol that our engine would struggle with.

[nascarnation]

Not sure about your numbers.
The story quotes 13,000 miles (seemingly referring to the one way trip he’s already covered) which is about double the air distance shown as 6500 on an airline calculator.

Now that old buggy might on a real good day get 15mpg.
so 13,000/15 is 866 gals. I’m too lazy to pro-rate the fuel costs for each country segment of the trip.

[pieceofthepuzzle]

“My quick math says at least $2,000 in gas. I’m thinking a round trip ticket would have been less expensive.”

I’m going and can tell you that your calculation is probably true, if you booked very much in advance. As it turns out, I’m paying around the same to fly, and it is a coach ticket (ouch!).