Toyota 2006 Tundra Owner's Manual page 363

OCTANE RATING
4.0 L V6 (1GR−FE) engine:
Octane Rating 87 (Research
Number 91) or higher. For improved
vehicle performance, use premium
unleaded gasoline with an
Rating of 91 (Research Octane Number
96) or higher.
4.7 L V8 (2UZ−FE) engine:
Octane Rating 87 (Research
Number 91) or higher.
Use of unleaded gasoline with an octane
rating or research octane number lower
than stated above will cause persistent
heavy knocking. If it is severe, this will
lead to engine damage.
If your engine knocks...
If you detect heavy knocking even when
using the recommended fuel, or if you
hear steady knocking while holding a
steady speed on level roads, consult your
Toyota dealer.
However, occasionally, you may notice
light knocking for a short time while accel-
erating or driving up hills. This is normal
and there is no need for concern.
352
GASOLINE CONTAINING
ADDITIVES
Select
Octane Toyota recommends the use of gasoline
that contains detergent
avoid build−up of engine deposits.
Octane
However, all gasoline sold in the U.S.
contains detergent additives to keep clean
and/or clean intake systems.
Select
QUALITY GASOLINE
Octane
Automotive manufacturers in the U.S.,
Europe and Japan have developed a
specification for quality
World−Wide Fuel Charter (WWFC) that
is expected to be applied world wide.
The WWFC consists of four categories
that depend on required emission lev-
els. In the U.S., category 3 or 4 has
been adopted. The WWFC improves air
quality by providing for better emis-
sions in vehicle fleets, and customer
satisfaction through better vehicle per-
formance.
'06 TUNDRA_U (L/O 0508)
DETERGENT CLEANER BURNING GASOLINE
Cleaner burning gasoline, including re-
formulated gasoline that contains oxy-
additives to genates such as ethanol or MTBE is
available in many areas.
Toyota recommends the use of cleaner
burning gasoline and appropriately blended
reformulated gasoline. These types of gas-
oline provide
mance, reduce vehicle emissions, and im-
prove air quality.
OXYGENATES IN GASOLINE
fuel named
Toyota allows the use of oxygenate
blended gasoline where the oxygenate
content is up to 10% ethanol or 15%
MTBE. If you use gasohol
Toyota, be sure that it has an octane
rating no lower than 87.
Toyota does not recommend the use of
gasoline containing methanol.
2006 TUNDRA from Oct. '06 Prod. (OM34458U)
excellent vehicle perfor-
in your