> When the oil runs out.
Ha ha ha ha ha.
When exactly would that be?
Don't forget to frame your answer in an appropriate timeframe; that is, you might start with
# "It's 1973; in XX years, when all the oil is gone, ..."
and then
# "It's 1985; in YY years, when all the oil is gone, ..."
finally we can get to
# "It's 1998; in ZZ years, when all the oil is gone, ..."
I will only accept an answer where XX < YY < ZZ ...
Pencils down. Your answers?
/jordan