After 2 years, the steps I took to start the engine on my XJ40. Steps - replace oil - replace coolant - replace sparkplugs, HT leads, rotor arm and cap - Fill with at least a gallon of fresh fuel - put some upper cylidner lubricant down the cylinders, leave for 20 minutes. - Remove all the plugs and spin the car over on the starter, for 10 seconds. I completed this step but neglected to video it. This builds up oil pressure - replace plugs, and start. - leave to idle for half an hour to fully warm the engine through.