I would VERY seriously advice against using debit card at gas stations. Especially directly at pump. And especially if debit card is from country where consumer protection is not greatest protecting from fraud.

Two facts:

- Three of my friend's cards were skimmed at gas stations - two at Bay Area and one at NY area. After that several hundred/thousand $ were drained from their accounts. This continues happening all the time - just google 'card skimming at pump' and you will see results.

- Banks are way less willing/cooperative to deal with debit card fraud, especially when PIN is involved comparing to credit card fraud. And in come countries you might be SOL trying to get your money back. I know a story how one guy's card was skimmed and local Singaporean bank refused to refund money. He lost about $8000.

I personally when travelling leave all my Singaporean debit cards home, take only US Capital One card where the account has less than $1000 and only withdraw money at ATMs which are inside bank branches. For everything else - credit card/online payment (95% cases) or cash (mostly at developing countries).