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:
Starting Procedure
1. With your foot off the accelerator pedal, turn the ignition to START. When
the engine cranks, let go of the key. The idle speed will go down as the engine
gets warm.
The vehicle has a Computer-Controlled Cranking System. It assists in starting
the engine and protects components. If the ign ...
Tires
Every new GM vehicle has high-quality tires made by a leading tire manufacturer.
See the warranty manual for information regarding the tire warranty and where to
get service. For additional information refer to the tire manufacturer.
Warning
. Poorly maintained and improperly used tires are ...
SIR Disabling and Enabling
SIR component location affects how a vehicle should be serviced. There are parts
of the SIR system installed in various locations around a vehicle. To find the location
of the SIR components refer to Supplemental Inflatable Restraint System Description
and Operation.
There are several reason ...
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