I love these gas prices! its time to start drivin the v8 again 
You are showing your age. I remember when gas was under $2 a gallon!
Let me show my age. I remember when gas was less than $1/gallon.
I also remember when gas first went over $1/gallon: People were totally freaked out and thought the world was ending.
My hats off to you sir!
FILL'ER'UP!
gas will start being "too expensive" when we stop using it to fill our cars and start using vegetable oil or whatever alternative is just barely cheaper. it might be more expensive than it was in the golden years of $1/gal, but nothing is going to change until gas hits the threshold where it is no longer worth using. opp costs.