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:
Cruise Control Description and Operation
Cruise control is a speed control system that maintains a desired vehicle speed
under normal driving conditions at speeds above 40 km/h (25 mph). Steep grades may
cause variations in the selected vehicle speeds.
The following are the main components of the Cruise Control System:
...
Front Camber Adjustment
Note: DO NOT grind the front strut bores for the bolts to allow
adjustment of the front camber. There are service bolts available to allow
the front camber to be adjusted, if needed.
If the front camber is out of specifications, perform the following:
Remove the f ...
Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and
Connection
Removal Procedure
Note: Perform the following procedure when removing the retaining
rings and cooler lines from the quick connect fittings located on the
radiator and/or the transmission.
Pull the plastic cap back from the quick connect fitting
and dow ...
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