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Description: Ginetta G40 Fuel System

Fuel Tank

The fuel tank is a sealed FIA-specification fuel cell, much like a bag within an aluminium box. The capacity is approximately 42 litres.

The fuel tank is located behind the driver and can only be accessed by removing the panel in the boot. The fuel filler pipe, between the tank and the filler nozzle, can only be replaced by removing the rear window of the car.

The fuel pump is on the top-left of the fuel tank. The fuel filter is probably inside the tank.

Fuel Measurement

The dashboard fuel gauge in the G40 is not reliable. I find that when the tank is full, the gauge registers 3/4 full for the first 15 miles. After about 30 miles on track, or one hour of road driving the fuel gauge registers quarter full or close to empty, whereas it probably has more than half left.

There is a fuel drain valve in the engine bay, where the fuel line runs across the bulkhead in front of the driver. New G40s come supplied with the adapter for the fuel valve and a length of drainage hose, but you'll need to attach a pump (available from Ginetta for approx. £150).

If you don't have a fuel pump or accurate method of measuring, just know that you'll use about 7 litres per 20-minute track session (approximately 0.4 litres per minute). I try to start on half a tank and top up 10 or 15 litres after about 20-30 track minutes.

Example fuel requirements per minute

  • 15 minute race (incl. green flag) = 0.4 * 20 = 8 litres minimum
  • 45 minute race (incl. green flag & mandatory pit stop) = 0.4 * 50 = 20 litres minimum
  • Note: fuel weighs approximately 0.77 KG / litre and the G40 uses about 0.4 to 0.5 litres per racing minute


The Zetec engine will run on 95 or 98 fuel. I don't find any difference in performance between 95 or 98.