I'm not a penny pincher, I just hate paying so much extra for premium on principal. It used to be that around where I live (South Carolina, North Carolina) premium was only about 7 cents more per gallon. Last night I went to get gas, and premium was 21 cents more per gallon. That's just crazy. I can afford to pay the extra $200 a year (based on 18 gallons used a week), but a lot of people can use the extra money.
BTW, I changed my driving habits just a little bit, and I managed to pull out 24.87 mpg on my last tank!