Everytime gas prices go up, I hear alot of my friends, with nice cars, talk about having to put regular unleaded gas in, instead of premium like they usually do to save money. this evokes a snicker from me and they ask me what's my problem? I explain that the difference in regular vs premium is still the same. thier first reaction is "No way, gas prices are through the roof". true, but the difference is still the same. consider this: Before Gas prices go up you are paying: 2.30 / regular 2.45 / Mid 2.60 / premium For easy math, let's assume you need 10 gallons. Regular @ 10gals is $23.00 Mid @ 10gals is $24.50 Premium @ 10gals is $26.00 difference is $3.00 between regular and premium So prices go up...typically the increment between grades is the same, .15 cents in my example. this mirrors what I see at the stations I frequent. 3.30/ regular 3.45 / Mid 3.60 / premium Regular @ 10gals is $33.00 Mid @ 10gals is $34.50 Premium @ 10gals is $36.00 difference is $3.00 between regular and premium. A friend of mine with an MCS started using grocery store gas...and regular unleaded to boot when prices went up last year. Lot's of carbon buildup and a trip to the service department later, she ended up paying more to fix her car then to use the right gas to start with. I know there's a lot of debate wheter or not you need premium...for me, I don't want to take the chance over $3. that's $150/yr if I fill every week....which I don't. And then there's the top tier gas debate. my feelings are this: If you are goign to buy an expensive car with a high performing engine...why put cheap gas in it? If you don't want to spend the money on gas, buy a cheap car that doesn't mind sucking cheap fuel. Again... these are all my perspectives...feel free to chime in and offer your thoughts.