Toyota Tundra Owners Manual: Fuel information

Gasoline engine

You must only use unleaded gasoline.

Select octane rating 87 (Research Octane Number 91) or higher.

Use of unleaded gasoline with an octane rating lower than 87 may result in engine knocking. Persistent knocking can lead to engine damage.

At minimum, the gasoline you use should meet the specifications of ASTM D4814 in the U.S.A.

Flex-fuel engine

You must only use unleaded gasoline, E85, or a blend of the two fuels.

Unleaded gasoline (Octane rating 87 [Research Octane Number 91] or higher), E85, or a blend of two fuels is required for optimum engine performance.

The use of unleaded gasoline with an octane rating lower than 87 may result in engine knocking. Persistent knocking can lead to engine damage.

The use of fuel with an ethanol concentration in excess of 85% will have a negative impact on driving performance and can cause damage to the fuel system components.

At minimum, the gasoline you use should meet the specifications of ASTM D4814 in the U.S.A.

At minimum, the E85 you use should meet the specifications of ASTM D5798 in the U.S.A.

■Identifying flex-fuel vehicles Flex-fuel vehicles can be identified by the fuel tank cap, which is marked "FLEXFUEL E85/GASOLINE".

■Gasoline quality In very few cases, driveability problems may be caused by the brand of gasoline you are using. If driveability problems persist, try changing the brand of gasoline. If this does not correct the problem, consult your Toyota dealer.

■E85 fuel (Flex-fuel vehicles)

  • E85 fuel is a blend of 85% ethanol and 15% gasoline. However, E85 does not necessarily contain 85% ethanol. For example, in cold climates the ethanol content of E85 may be reduced during the winter months to maintain cold weather starting performance.
  • E85 has less energy per gallon than gasoline, so you will need to fill your fuel tank more frequently when using E85.
  • The number of fuel stations that sell E85 fuel is limited. For more information about fueling stations, please refer to the U.S. Department of Energy Web site.

    http://www.afdc.energy.gov/afdc/locator/stations/

■Recommendation of the use of gasoline containing detergent additives

  • Toyota recommends the use of gasoline that contains detergent additives to avoid build-up of engine deposits.
  • All gasoline sold in the U.S.A. contains minimum detergent additives to clean and/or keep clean intake systems, per EPA's lowest additives concentration program.
  • Toyota strongly recommends the use of Top Tier Detergent Gasoline. For more information on Top Tier Detergent Gasoline and a list of marketers, please go to the official website www.toptiergas.com.

■Recommendation of the use of low emissions gasoline Gasolines containing oxygenates such as ethers and ethanol, as well as reformulated gasolines, are available in some cities. These fuels are typically acceptable for use, providing they meet other fuel requirements.

Toyota recommends these fuels, since the formulations allow for reduced vehicle emissions.

■Non-recommendation of the use of blended gasoline (gasoline engine)

  • Use only gasoline containing up to 15% ethanol.

    DO NOT use any flex-fuel or gasoline that could contain more than 15% ethanol, including from any pump labeled E30, E50, E85 (which are only some examples of fuel containing more than 15% ethanol).

Specifications

  • If you use gasohol in your vehicle, be sure that it has an octane rating no lower than 87.
  • Toyota does not recommend the use of gasoline containing methanol.

■Non-recommendation of the use of gasoline containing MMT Some gasoline contains an octane enhancing additive called MMT (Methylcyclopentadienyl Manganese Tricarbonyl).

Toyota does not recommend the use of gasoline that contains MMT. If fuel containing MMT is used, your emission control system may be adversely affected.

The malfunction indicator lamp on the instrument cluster may come on. If this happens, contact your Toyota dealer for service.

■Non-recommendation of the use of after-market fuel additives (Flex-fuel vehicles) Do not use any after-market fuel additives when repeatedly refueling with E85, as some after-market fuel additives are not compatible with E85.

■If your engine knocks

  • Consult your Toyota dealer.
  • You may occasionally notice light knocking for a short time while accelerating or driving uphill. This is normal and there is no need for concern.
NOTICE

■Notice on fuel quality

  • Do not use improper fuels. If improper fuels are used, the engine will be damaged.
  • Do not use leaded gasoline.

    Leaded gasoline can cause damage to your vehicle's three-way catalytic converters causing the emission control system to malfunction.

  • Gasoline engine: Do not use gasohol other than the type previously stated.

    Other gasohol may cause fuel system damage or vehicle performance problems.

  • Using unleaded gasoline with an octane number or rating lower than the level previously stated will cause persistent heavy knocking.

    At worst, this will lead to engine damage.

■When use of non-specified fuels (Flex-fuel engine) The use of non-specified fuels will have a negative impact on starting and driving performance, and will cause damage to the fuel system components.

Therefore, do not add fuels such as the following.

  • Fuels containing methanol
  • Fuels with more than 85% ethanol

■Fuel-related poor driveability If poor driveability (poor hot starting, vaporization, engine knocking, etc.) is encountered after using a different type of fuel, discontinue the use of that type of fuel.

■When refueling with gasohol Take care not to spill gasohol. It can damage your vehicle's paint.

    Maintenance data (fuel, oil level, etc.)

    Tire information

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