Gasoline Octane; Gasoline Specifications; California Fuel - Pontiac G3 2010 Owner's Manual

Gasoline Octane

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, commonly referred to as
spark knock, might be heard when driving. If this
occurs, use a gasoline rated at 87 octane or higher as
soon as possible. If heavy knocking is heard when
using gasoline rated at 87 octane or higher, the engine
needs service.

Gasoline Specifications

At a minimum, gasoline should meet ASTM
specification D 4814 in the United States or
CAN/CGSB 3.5 or 3.511 in Canada. Some gasolines
contain an octane-enhancing additive called
methylcyclopentadienyl manganese tricarbonyl (MMT).
We recommend against the use of gasolines containing
MMT. See Additives on page 6 7 for additional
information.
6-6

California Fuel

If the vehicle is certified to meet California Emissions
Standards, it is designed to operate on fuels that meet
California specifications. See the underhood emission
control label. If this fuel is not available in states
adopting California emissions standards, the vehicle will
operate satisfactorily on fuels meeting federal
specifications, but emission control system performance
might be affected. The malfunction indicator lamp could
turn on and the vehicle might fail a smog check test.
See Malfunction Indicator Lamp on page 4 29. If this
occurs, return to your authorized dealer/retailer for
diagnosis. If it is determined that the condition is caused
by the type of fuel used, repairs might not be covered
by the vehicle warranty.