I've recently acquired an orphaned LR Disco2 SE. Head gasket and water pump were both leaking coolant. Fortunately, it was not overheating, so the plan is to rehabilitate the English lass in time for hunting season. Heads are off and are being Cleaned and checked. Parts are on the way and will be here before the weekend. Will be replacing: Head gaskets, and all the gasket north required. Valve seals, Water pump, timing set, Ignition wires, Thermostat, Coolant flush, Oil change. Pan will come off and cleaned when the timing set is changed. So as for oil, I want to do a quick change following the work, so I bought a jug of Supertech 10w-40 for cheap, and a Fram filter to go with it. Will likely run a quart of MMO with the 10w-40 to reach 6 qt volume. The engine is fairly heavily varnished. How long would you run this Oil? A) Start engine and run till warmed up, then dump B) Drive around for 20-30 mins then drain B) A full tank of fuel worth of easy driving C) 1K D) 3K I have M1 10w-40 HM on hand which will be the next fill with a Mahle filter.