Adding Equipment To The Outside Of The Vehicle; Fuel; Gasoline Octane - Cadillac 2010 DTS Owner's Manual

Keep a record with all parts receipts and list the mileage
and the date of any service work performed. See
Maintenance Record on page 7-12.
Adding Equipment to the Outside of
the Vehicle
Things added to the outside of the vehicle can affect the
airflow around it. This can cause wind noise and can
affect fuel economy and windshield washer performance.
Check with your dealer/retailer before adding equipment
to the outside of the vehicle.

Fuel

Use of the recommended fuel is an important part of the
proper maintenance of this vehicle. To help keep the
engine clean and maintain optimum vehicle
performance, we recommend the use of gasoline
advertised as TOP TIER Detergent Gasoline.
Look for the TOP TIER label on the fuel pump to ensure
gasoline meets enhanced detergency standards
developed by auto companies. A list of marketers
providing TOP TIER Detergent Gasoline can be found
at www.toptiergas.com.

Gasoline Octane

Use premium unleaded gasoline with a posted octane
rating of 91 or higher. You can also use regular
unleaded gasoline rated at 87 octane or higher, but the
vehicle's acceleration could be slightly reduced, and
a slight audible knocking noise, commonly referred to as
spark knock, might be heard. If the octane is less
than 87, you might notice a heavy knocking noise when
you drive.
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