A leaky injector will drop raw fuel into the cylinder. If this raw fuel is not burned properly and does not go through the exhaust system, it ends-up in the oil pan. Raw gasoline will wash off all oil from the cylinder walls and dilute your engine oil. Thin baby oil is nor very good at lubricating the crasksaft/camshaft bearings, valve train and everything else inside the engine, thus, accelerated wear.
JackD