121Fuel consumption, fuel, refuellingFuel consumption,fuel, refuellingFuel consumptionFuel consumption is determined underspecific driving conditions – see page 200.Special equipment increases the weight ofthe vehicle. As a result, they can increasefuel consumption and reduce the specifiedmaximum speed.There is increased friction between engineand transmission parts during the first600 miles (1000 kilometres). This increasesfuel consumption.Fuel for petrol enginesCommercially available high-quality fuelwith a maximum ethanol content of 5% asper DIN EN 228 (catalytic converter -see page 124, octane numbers -see page 198).Fuel quality has a decisive influence onpower output, running behaviour andservice life of the engine. The additivescontained in the fuel play an important rolein this regard. You should therefore onlyuse high-quality fuels containing additives.Fuels with ethanol content greater than 5%do not comply with DIN EN 228 and mustnot be used unless the vehicle has beenspecifically developed and approved foruse of such.Fuel with too low an octane number cancause pinking. Vauxhall cannot be heldliable for resulting damage.Petrol with a higher octane number canalways be used.Pump nozzles for leaded fuel cannot beinserted into the filler neck of vehicles thatoperate on unleaded fuel.The ignition timing is automaticallyadjusted according to the grade of fuelused (octane number) – see page 198.Use of petrol with an octane rating of 95will ensure economical driving.Fuel consumption ................................ 121Fuel for petrol engines ........................ 121Fuel for diesel engines......................... 122Fuel filler cap........................................ 122Refuelling.............................................. 122