Originally Posted by low-n-slow
Even if I drive like a grandma..
I was just brought up ever since I started learning automotive that the harder you drive it the more octane you need. I understand there are circumstances where some cars (my Grandpas cadillac) which says right by the gas gauge "Premium Unleaded Fuel Only" But like with my car I never really exceed 3,000rpm so I just don't feel the need to fill it up with premium.
You have an STi and rarely go over 3,000 rpm?! Sell that car now and buy yourself a Fiesta and floor it everywhere! Lower cost to maintain, same performance for the way you currently drive and better gas mileage!
Also using your logic would equate to eating at McD's everyday because you aren't professional athlete. Doing that would mess up your insides like low grade gas can mess up your engine.