During an interview with the OC Register, John McCain acknowledges that he does not pump his own gas and seems to suggest he doesn't know the price of gas.

Via Think Progress:
http://thinkprogress.org/2008/06/28/mccain-gas-prices-unaware/

"McCain's cluelessness about gas prices is compounded by the fact that he is clueless about what to do about it. He is promoting a gas tax holiday for drivers because he claims to understand 'Americans are hurting.' It will provide 'a little psychological boost,' McCain said of his plan.

In reality, his gas tax holiday would be worth a mere 60 cents a day for Americans and would be a boon for oil companies and foreign oil-producing nations. It would drive up the deficit. Moreover, the proposal would rob $1.4 billion from 'public transportation and severely restrict the industry's ability to add and improve transit services for a growing number of Americans.'"