If he's seen again on the fireline he'd better keep good hold on it or someone is likely to pilfer it. The tanker has a battery isolator switch. Turn it on when you arrive, off before you leave. Learn where it is and how it operates on your first visit. Engine oil and funnel are at the front of the shed.
Super petrol is in the red jerry can on the back of the tanker.
A petrol funnel is in the compartments immediately behind the crew cab on the right hand side of the truck. Vehicle check Radiator coolant level. Top up to FULL mark. Sump oil level. Top up if necessary.