Welcome to CruzeTalk and congrats on your Cruze. As jblackburn said, try 89 and then 91. If you can't feel the difference between 89 and 91 then use 89. Otherwise you need to decide if the extra cost of 91 is worth the improvements you receive.
Thanks everyone! I purchased the car this past Friday. The dealership had already purchased gas for it. But I assume it wasn't very good gas because its been acting kinda sluggish and when I test drove, it didnt seem that way to me.
Welcome to the forum amcguffries! So glad you decided to join us. Congrats on your new Cruze. I am sure you are loving the Cruze gas mileage coming from a truck! Please let me know if you have any questions about features, your warranty, dealership locations or anything else Cruze related. You can always send me a message and I will be happy to assist you.
Congratulations on your new LT. I fill up with chevron 93 octane and it runs great. I guess the extra 5 bucks on a tank is well worth it. But anyways fill up only from tier 1 gas stations (I.E. chevron, shell etc)