As the driver of a 2003 Cadillac CTS, You may be wondering what type of fuel it requires for driving day to day. With a 3.0 liter engine, this vehicle needs to be filled with regular, unleaded gasoline. The fuel should have an octane rating of 87 or higher. This means that You will be able to easily access it from the vast majority of service stations on a road trip, as it is the most plentiful, most affordable, option to many drivers. Using a fuel that is below a vehicle's required octane rating is detrimental to the engine, sometimes resulting in irreparable damage.
David Jordan Alexander
May 17, 2021
The car is to only have premium gas 91+. States this within the manual and inside the fuel door. You'll notice knocks, lifter clatter, less gas mileage, and diminished horse power if a lesser grade is used.
Carol J.
April 9, 2020
According to the owner's manual, the gas the a 2003 cadillac cts takes is 87 octane gasoline.
The Questions and Answers on this page are the statements and opinions of their respective authors and not VehicleHistory.com. VehicleHistory.com
does not research or authenticate any of the Answers provided.