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:
Driver or Passenger Seat Back Cushion Heater Replacement
Driver or Passenger Seat Back Cushion Heater Replacement
Callout
Component Name
Warning: Refer to SIR Warning.
Preliminary Procedure
Remove the driver or passenger seat. Refer to Driver or Passenger
Seat Remov ...
Brake Drum Surface and Wear Inspection
Special Tools
CH-8001 Dial Indicator Set
For equivalent regional tools, refer to Special Tools.
Warning: Refer to Brake Dust Warning.
With the brake drum removed, clean the brake shoe lining contact surface
of the brake drum with denatured alcohol or an equivalent approved brak ...
Torque Converter Removal
Torque Converter Removal
Callout
Component Name
1
Lock Pin
Warning: Lock pin must be secured into the bench fixture to
hold the transmission and prevent bodily injury.
Note: Ensure the DT ...
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