Suzuki XL7 - Manual (Page 186)

5-2
SERVICE AND APPEARANCE CARE
78J00-03E
Fuel
Use of the recommended fuel is an impor-
tant part of the proper maintenance of your
vehicle. To help keep the engine clean and
maintain optimum vehicle performance, we
recommend 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 contain an octane-
enhancing additive called methylcyclopen-
tadienyl manganese tricarbonyl (MMT).
We recommend against the use of gaso-
lines containing MMT. Refer to “Additives”
in this section for additional information.
California Fuel
If your vehicle is certified to meet California
Emissions Standards, it is designed to
operate on fuels that meet California spec-
ifications. See the underhood emission
control label. If this fuel is not available in
states adopting California emissions stan-
dards, your vehicle will operate satisfacto-
rily on fuels meeting federal specifications,
but emission control system performance
may be affected. The malfunction indicator
lamp may turn on and your vehicle may fail
a smog-check test. Refer to “Malfunction
Indicator Lamp” in “Warning Lights, Gages,
and Indicators” in the “Instrument Panel”
section. If this occurs, return to your autho-
rized dealer for diagnosis. If it is deter-
mined that the condition is caused by the
type of fuel used, repairs may not be cov-
ered by your warranty.
Additives
To provide cleaner air, all gasolines in the
United States are now required to contain
additives that will help prevent engine and
fuel system deposits from forming, allow-
ing your emission control system to work
properly. In most cases, you should not
have to add anything to your fuel. How-
ever, some gasolines contain only the min-
imum amount of additive required to meet
U.S. Environmental Protection Agency
regulations. To help keep fuel injectors and
intake valves clean, or if your vehicle expe-
riences problems due to dirty injectors or
valves, look for gasoline that is advertised
as TOP TIER Detergent Gasoline. Also,
your dealer has additives that will help cor-
rect and prevent most deposit-related
problems.
Gasolines containing oxygenates, such as
ethers and ethanol, and reformulated gas-
olines may be available in your area. We
recommend that you use these gasolines,
if they comply with the specifications
described earlier. However, E85 (85% eth-
anol) and other fuels containing more than
10% ethanol must not be used in vehicles
that were not designed for those fuels.