I'm confused too Paul. It's got to be hold mode. Surely if we burn petrol in hold mode, the car is going to be using petrol to keep the battery charged at that level, including when the car uses a bit of battery to give a 'boost' in hills etc. I'm not sure we should be including use of hold mode in these clubs

Surely it has to be battery only, in continuous use, no petrol burning allowed from start to finish?