Most cars that require premium will run just as well on mid grade, but usually if you use regular the MPG goes down so that offsets the savings.
Thank you....I have been wondering about that! I used reg in my car for 5 years and then noticed it skipping and asked about that during checkup. My servicegirl told me that my car does better on PREMIUM and that using that grade would give me better performance and higher MPG. Sounded like someone was sleeping with Texaco to me.