Damn, how did I get a mention in this thread? Guilty of dumb wastage for using premium gas when OBVIOUSLY these reputable websites know far, far more than me, my car and driving. Yep, guilty as charged...I'll just go back to driving to my lil premium filling world and continue my route with 600+ miles tank, fill up on Premium, 600+ tank, fill up on Premium, 700+ tank, fill up on Premium, 800+ tank fill up on Premium....yeah, whadda I know...
Jokes aside, I suggest all of you do you own testing and come to your own conclusion. I for one am not pushing anyone to use Premium - if you believe and feel its wasteful, go ahead and stop, or don't use it. Its a free country, as far as I know today.
Jus, I didn't mean any disrespect, just you and Matt are getting the best mileage of anyone I know and you both use premium. I do not trust any individual website or organization, everyone has their biases, but not one site I found was in favor of premium over regular for fuel economy. By all means, if you want to keep using premium it is your decision what you put in your car. I was convinced that premium would give me better mileage from reading different posts from different people in this forum, because of that I even posted that I thought using premium helped someone get better mileage. I still may try it for a tank or two to see if it does anything for me, but it seems there is a consensus against it. Even the ecomodder website does not mention premium in its 65+ ways to get better fuel economy.
i think it's not just premium gas but the brand as well. premium Arco crap gas is not the same as Premium Shell, Mobil, 76 or Chevron . there was an interesting article i read where it talks about how if you change brand each time you fill up you are creating a new gas blend so it's best to stick with one brand for at least 5000 miles then switch to a different to get the best life in your car and minimize deposits and crud in your tank.
what brand did you use snig?
I am not particular to a specific brand, I get gas at a couple different gas stations depending on where I am when I need gas. My current tank that I'm getting 51.8 mpg with I used Exxon regular. As I've only filled up once that's all my C-Max has seen, but I also fill up at a Shell and a Hess. I've always calculated my mpg when I fill up and I've never noticed a major difference with any of my previous cars, it will be interesting to see what happens with different brands with the C-Max.
Edit: I am always skeptical when organizations make claims about something being better than something else. The best way to qualify their opinion, in my opinion, is to see who funded the study. Amazing how people find results in favor of one thing or another if they are being paid by someone who has a horse in the race. That's why when there was a consensus against premium giving you better fuel economy in these websites, I was surprised. Big oil has a lot of money, you would think they would have funded a study or two to dirty the water on whether the more expensive gas is better for fuel economy.
Jus and Matt, can you try running regular gas for a tank and see what happens? (totally up to you of course) If you guys see a drop in your mileage then I guess these websites could be wrong.
Edited by SnitGTS, 23 June 2013 - 10:26 AM.