Chevrolet Sonic Owner's Manual: Recommended Fuel
Use regular unleaded gasoline with a posted octane rating of 87 or higher. If the octane rating is less than 87, an audible knocking noise may be heard. If this occurs, use a gasoline rated at 87 octane or higher as soon as possible. If heavy knocking is heard when using gasoline with a higher octane rating, the engine needs service.
Use of Seasonal Fuels
Use summer and winter fuels in the appropriate season. Driving or starting could be affected if the incorrect fuel is used. Drive the vehicle with the engine running until the fuel is a half tank or less, then refuel with the current seasonal fuel.
Prohibited Fuels
Gasolines containing oxygenates, such as ethers and ethanol, as well as reformulated gasolines are available in some cities. If these gasolines comply with the previously described specification, then they are acceptable to use. However, E85 and other fuels containing more than 15% ethanol must be used only in FlexFuel vehicles.
Caution
Do not use fuel containing methanol. It can corrode metal parts in the fuel system and also damage plastic and rubber parts. That damage would not be covered under the vehicle warranty.
Some gasolines that are not reformulated for low emissions can contain an octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl (MMT). Do not use gasolines with MMT as they can reduce spark plug life and affect emission control system performance. The malfunction indicator lamp may turn on. If this occurs, see your dealer for service.
Fuel
Use of the recommended fuel is an important part of the proper maintenance of
this vehicle. When driving in the U.S., to help keep the engine clean and maintain
optimum vehicle performance, we rec ...
Gasoline Specifications
At a minimum, gasoline should meet ASTM specification D 4814. Some gasolines
contain an octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl
(MMT). We recommend against th ...
Other materials:
Torque Steer Description
A vehicle pulls or leads in one direction during hard acceleration. A vehicle
pulls or leads in the other direction during deceleration.
The following factors may cause torque steer to be more apparent on a particular
vehicle:
A slightly smaller diameter tire on the right front increa ...
Timing Belt Adjustment
Special Tools
EN-652 Flywheel Holder
EN-6333 Locking Pin
EN-6340 Locking Tool
EN-6628-A Locking Tool
EN-45059 Torque Angle Sensor Kit
For equivalent regional tool, refer to Special Tools.
Removal Procedure
Remove the timing belt upper front cover. Refer to Timing Bel ...
Automatic Transmission Shift Lock Control Description and Operation
The automatic transmission park lock control system is a safety device that prevents
an inadvertent shift out of PARK. The driver must press the brake pedal before moving
the park lever out of the PARK position. The system consists of the following components:
The automatic transmission pa ...
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