Fuel e85 (85% ethanol) – CHEVROLET Tahoe User Manual
Page 449
Fuel E85 (85% Ethanol)
The 8th digit of the Vehicle Identification Number
(VIN) shows the code letter or number that
identifies your vehicle’s engine. The VIN is at the
top left of the instrument panel. See Vehicle
Identification Number (VIN) on page 562.
If your vehicle has the 5.3L V8 engine (Code 0) or
the 5.3L V8 engine (Code 3), you can use
either regular unleaded gasoline or ethanol fuel
containing up to 85% ethanol (E85); also see Fuel
on page 446. In all other engines, use only the
unleaded gasoline described under Gasoline
Octane on page 447.
Only vehicles that have the 5.3L V8 engine
(Code 0) or the 5.3L V8 engine (Code 3) can use
85% ethanol fuel (E85). We encourage the use
of E85 in vehicles that are designed to use it. The
ethanol in E85 is a “renewable” fuel, meaning it
is made from renewable sources such as corn and
other crops.
Many service stations will not have an 85%
ethanol fuel (E85) pump available. The U. S.
Department of Energy has an alternative
fuels website (www.eere.energy.gov/afdc/
infrastructure/locator.html) that can help you
find E85 fuel. Those stations that do have E85
should have a label indicating ethanol content. Do
not use the fuel if the ethanol content is greater
than 85%.
At a minimum, E85 should meet ASTM
Specification D 5798. By definition, this means
that fuel labeled E85 will have an ethanol content
between 70% and 85%. Filling the fuel tank
with fuel mixtures that do not meet ASTM
specifications can affect driveability and could
cause the malfunction indicator lamp to come on.
To ensure quick starts in the wintertime, the
E85 fuel must be formulated properly for your
climate according to ASTM specification D 5798. If
you have trouble starting on E85, it could be
because the E85 fuel is not properly formulated
for your climate. If this happens, switching to
gasoline or adding gasoline to the fuel tank can
improve starting. For good starting and heater
efficiency below 32°F (0°C), the fuel mix in the fuel
tank should contain no more than 70% ethanol.
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