Adding Equipment to the Outside
of Your Vehicle
Things you might add to the outside of your
vehicle can affect the airflow around it. This may
cause wind noise and affect windshield washer
performance. Check with your dealer before
adding equipment to the outside of your vehicle.
Fuel
Use of the recommended fuel is an important part
of the proper maintenance of your vehicle.
To help keep the engine clean and maintain
optimum vehicle performance, GM recommends
the use of gasoline advertised as TOP TIER
Detergent Gasoline.
Gasoline Octane
Use regular unleaded gasoline with a posted
octane rating of 87 or higher. If the octane rating is
less than 87, you may notice an audible knocking
noise when you drive, commonly referred to as
spark knock. If this occurs, use a gasoline rated at
87 octane or higher as soon as possible. If you are
using gasoline rated at 87 octane or higher and you
hear heavy knocking, your engine needs service.
Gasoline Specifications
At a minimum, gasoline should meet ASTM
specification D 4814 in the United States or
CAN/CGSB-3.5 in Canada. Some gasolines may
contain an octane-enhancing additive called
methylcyclopentadienyl manganese tricarbonyl
(MMT). General Motors recommends against the
use of gasolines containing MMT. See
on page 252
for additional information.
251
Summary of Contents for 2007 Optra
Page 6: ...These are some examples of symbols that may be found on the vehicle 6 ...
Page 20: ...Put someone on it Get it up to speed Then stop the vehicle The rider does not stop 20 ...
Page 132: ... NOTES 132 ...
Page 135: ... NOTES 135 ...
Page 136: ...Instrument Panel Overview 136 ...
Page 138: ...138 ...
Page 244: ... NOTES 244 ...
Page 354: ...Engine Drive Belt Routing 2 0L L4 Engine 354 ...
Page 385: ...Maintenance Record cont d Date Odometer Reading Serviced By Maintenance Record 385 ...
Page 386: ...Maintenance Record cont d Date Odometer Reading Serviced By Maintenance Record 386 ...
Page 408: ... NOTES 408 ...