Apparatus for use in fuel measurement; Fuel consumption measuring apparatus; Fuel regulating apparatus; Electronic control units for determining the quantity of fuel injected into engines; Electronic overfill protection tank levelling system; Apparatus for fuel and lubricant evacuation and filing for engines; Electronic fuel measurement and managing systems comprising electrical and electronic measuring instruments for use in measuring fuel consumption for land vehicles and fuel tank overfill protection systems comprising fuel level sensors and fuel level indicators; Hydrocarbon use measurement system for monitoring, reconciliation and centralised reporting of any machine of vehicle's fuel or liquid use; Electronic fuel monitoring system; Electronic control units for determining the quantity of fuel injected into motors; Electronic monitoring system