GMC Hummer H3 2008 Owner's Handbook Manual page 246

CAUTION
Fuel vapour is highly flamma-
ble. Keep sparks, flames and
smoking materials away from
fuel.
CAUTION
If you smell fuel fumes while
driving, there may be a prob-
lem. See your dealer for service
right away.
NOTICE
Use clean fuel only. Contami-
nated fuel may reduce the life
of the fuel delivery system and
the engine.
Fuel containing oxygenates,
such as ethers and ethanol, and
reformulated fuel may be avail-
able in your area.
It is recommended that you use
these fuels if they comply with
the required fuel specifications.
However, E85 (85% ethanol)
and other fuels containing
more than 10% ethanol must
not be used in vehicles that
were not designed for those
fuels.
Section 4
NOTICE
Use of an inappropriate grade
fuel or improper fuel additives
may result in serious damage to
the engine and catalytic
converter.
Do not use fuel containing the
octane-enhancing additive
called methylcyclopentadienyl
manganese tricarbonyl (MMT).
Engine damage caused by the
use of any fuel or fuel additive
that is not recommended is not
covered by your vehicle
warranty.
245 . . .