I have had my Chevron Gas Card since the year 2000, and when I was approved for my Chevron credit card, my credit was in the toilet. It's basically your typical gas charge card, and they charge a very high interest rate of 24%. I can't imagine living in CA and practically paying $4 for a gallon of gas on top of racking up a gas credit card bill. But when I do charge gas on this card, I generally pay this card off in full. Also, since it's one of my oldest credit cards with excellent payment history, I won't close it.
Over the years of maintaining excellent payment history with them, they have upgraded my card to a Chevron Premium Gas card, which means that they will give your periodic gas discounts when you don't put anything on your card to get you to put gas purchases on your card. Also, I think I get hotel discounts and periodic discount on gas purchases when I use the card. I have been offered 10 cents off per gallon of gas if I charged a certain amount of gas within a certain period. I did it for the discount, and just paid off the balance in full before they tagged on the interest charges.
They started me off with an intial credit limit of $200. Now I have a $2,000 credit limit with them, and the most I have ever charged on this card was about $450. I haven't had any problems with Chevron, but they don't offer lower interest rates.