What the he!! are you guys talking about? First of all, the only thing premium has over regular is a higher octane rating. Other than that the gas is the same. It doesn't burn any cleaner or any more efficient nor will the engine or components wear out faster or get dirtier. Octane is just anti-knock rating. http://en.wikipedia.org/wiki/Octane_..._octane_rating Unless you're racing or towing you'll never notice the difference. You will never hear any pinging or knocking. Acura's have a knock sensor so at the first hint of knocking or pinging it will adjust the fuel and timing to stop it so you won't have to worry about any engine damage. Major gas stations buy gas from whoever has the cheapest gas, so Exxon will not have 100% Exxon gas at their pumps. Also cheap independent stations buy gas from the major gas companies. The tanks at bigger stations may be cleaner so I would get gas from a reputable place. If, on ocassion, you floor it and keep it floored until the transmission shifts to the next higher gear then you need premium if not you or your car will never notice the difference.Edit Friday, October 12, 2007http://www.edmunds.com/advice/fuelec...s_x.htmPremium is needed for max performance but if you want to get better fuel economy and drive like it, you won't need it. Have you noticed a drop in gas mileage?If your car absolutely positivly needed premium and engine damage would result in using a lower grade, the filler neck and gas nozzles would be designed so only premium could be pumped in, similar to the leaded gas and diesel nozzles.