Land Rover Discovery Owners & Service Manuals

Land Rover Discovery: Safety precautions

  • Avoid exposing the fuel gases to any potential sources of ignition, as the resulting fire and explosion may cause serious injuries and/or death.
  • Switch off the engine when refuelling.
  • Switch off any personal electronic devices, such as mobile phones or music players, when refuelling.


  • Use high quality fuel that meets the specification defined by EN228 (or the national equivalent).
  • Do not use leaded fuels, fuels with lead substitutes (e.g., manganese-based), or fuel additives, as these may adversely affect the emissions control systems, and may affect warranty coverage.
  • Fuel system cleaning agents should not be used, unless approved by the vehicle manufacturer.


This vehicle requires the use of premium unleaded fuel with a minimum octane rating of 95 RON, to contribute to optimum performance, fuel economy and driveability.

If premium unleaded fuel is not available, you may use unleaded fuel with a lower octane rating, down to a minimum of 91 RON but this may reduce engine performance, increase fuel consumption, cause audible engine knock and other driveability problems.

Do not use fuels with an octane rating lower than 91 RON as severe engine damage may occur.

Note: Occasional, light, engine knock, experienced while accelerating or climbing hills, is acceptable.

If a heavy persistent engine knock is detected, even when using fuel to the recommended octane rating, or if you hear engine knock while holding a steady speed on level roads, consult a Retailer/ Authorised Repairer to have the problem corrected. Failure to do so is misuse of the vehicle, which will not be covered by the vehicle's warranty.

If in doubt, seek advice from a Retailer/ Authorised Repairer in the territory concerned.

Super Green Plus 98 RON unleaded fuel (where available) may be used as an alternative to the standard 95 RON unleaded fuel.


Fuels containing up to 10% ethanol (E5 and E10) may be used.

  • This vehicle is not suitable for fuels containing more than 10% ethanol.
  • Do not use E85 fuels (85% ethanol content), as serious engine and fuel system damage will occur.

Make sure that the fuel has octane ratings no lower than those recommended for unleaded fuel. Most drivers will not notice any operating difference with fuel containing ethanol. If a difference is detected, the use of conventional unleaded fuel should be resumed.


Wherever possible, avoid using fuel containing methanol.

Use of fuels containing methanol may cause serious engine and fuel system damage, which may not be covered under warranty.


Unleaded fuel containing an oxygenate known as MTBE can be used, provided that the ratio of MTBE to conventional fuel does not exceed 15%. MTBE is an ether-based compound derived from petroleum, which has been specified by several refiners as the substance to enhance the octane rating of fuel.


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