Extreme Octane (>110 RON Octane!) Gull Force Pro is a specialty high performance fuel made from a blend of 85% bioethanol and 15% premium petrol i.e., an E85 fuel. Gull Force Pro is designed for use in Flexible Fuel (FlexFuel) vehicles which are able to run on any blend from E10 to E85, as well as normal petrol should the need arise. Holden has launched FlexFuel capable vehicles in the New Zealand market in 2010. It can also be used in specifically designed high performance motor racing engines, i.e., motor sports and rally cars.

Can I safely run my 4 litre X300 on this fuel?

 

Ask yourself this question.
Did Holden need to make any modifications to the engines used in the cars that were converted to run on this type of fuel and, if they did, has my Jaguar's engine been modified in the same sort of way?

 

Holden has made modifications to its flex-fuel engines to enable them to run on unleaded, E10, premium, Gull Force Pro E85 or a combination of these fuels. Modifications include hardened valves and valve seats and the inclusion of a flex-fuel sensor, which gauges the alcohol content of the fuel and adjusts the calibration accordingly.