Remove the spark plugs and add it for the pistons holes about five centimeters of a thin lubricant, it can be diesel or even fluid of transmissions, then if not attached, turn the engine, without placing the spark plugs, until the aggregate lubricant is expelled by the exhaust valves and the holes of the spark plugs, then place the spark plugs again, the cylinders will be lubricated. If the engine is not used, you should perform process with any frequency. If you turn on the engine, do not be scared by the smoke that will come out of the escape, soon it will disappear.
Luck.