I have been using only regular don't really attn. to the octane probably 87. I drive usually between 60 and 65 and the best Ive got was 37mpg. Thats with the cruise on. Tried without but can't stand it especially early the morning.

I bought this car and I thought the tires were the same but when I took a good look I had 2 different types but they were all Michelins. They all need replaced except 1. So I had a friend order me a new set of the Michelins MXV4+ what they recommended for this car. These cost mejust over $900 with installation. It gave me a little better of ride but not what I had in my 04 Regal. This suppension is not that good, because when I bought this car I put the Regal up to the Accord and both are the same length, so the length of the Regal wasn't the reason. I really lost trunk space with this car. I drive all type of road for job and I really feel the difference in the small highways that are rougher.

I don't have the money right now to buy new struts especially these thing my friend have he wants $200 ea nearly.