My family rents a cabin once every few years for a reunion. There, the caretaker for several of the cabins also has a hobby of restoring Model-T Fords. It is great fun. He takes the kids for rides around the loop, and I got to spend a half hour with him trying to understand the planetary gear system used in the Model-T.
Anyway, in the cabin there is a framed poster on the wall that outlines all of the lubrication procedures. Here is the section on engine oil:
Oil motor daily. Oil is added to the engine through the breather pipe at the front of the engine (a metal cap covers it). Down under the car on the fly wheel casing (the reservoir which holds the oil) you will find two pit cocks. Pour oil in slowly until it runs out of the upper cock. Leave the cock open until it stops running then close it. For the best results keep the oil level midway between the two cocks, but under no circumstances should it be allowed to get below the lower cock. About every 750 miles it is advisable to clean out the crankcase by draining off the dirty oil. This is done by removing the plug at the bottom of the crankcase. (This should be done while the engine is warm), after draining, replace the plug and pour in a gallon of kerosene through the breather pipe. Turn the engine over fifteen or twenty times so that the splash from the kerosene will thoroughly cleanse the engine. It is of vital importance that all of the kerosene be removed from the depression in the crankcase. To do this put about a quart of lubricating oil into the motor and turn the engine over several times. Then remove the crankcase plug and drain off the flushing oil, replace the plug and refill with fresh oil. During the winter months use a light weight oil (SAE 10) and during the summer (SAE 30). Graphite should never be used as a lubricant in the engine or the transmission, as it will have a tendency to short circuit the magneto.
Anyway, in the cabin there is a framed poster on the wall that outlines all of the lubrication procedures. Here is the section on engine oil:
Oil motor daily. Oil is added to the engine through the breather pipe at the front of the engine (a metal cap covers it). Down under the car on the fly wheel casing (the reservoir which holds the oil) you will find two pit cocks. Pour oil in slowly until it runs out of the upper cock. Leave the cock open until it stops running then close it. For the best results keep the oil level midway between the two cocks, but under no circumstances should it be allowed to get below the lower cock. About every 750 miles it is advisable to clean out the crankcase by draining off the dirty oil. This is done by removing the plug at the bottom of the crankcase. (This should be done while the engine is warm), after draining, replace the plug and pour in a gallon of kerosene through the breather pipe. Turn the engine over fifteen or twenty times so that the splash from the kerosene will thoroughly cleanse the engine. It is of vital importance that all of the kerosene be removed from the depression in the crankcase. To do this put about a quart of lubricating oil into the motor and turn the engine over several times. Then remove the crankcase plug and drain off the flushing oil, replace the plug and refill with fresh oil. During the winter months use a light weight oil (SAE 10) and during the summer (SAE 30). Graphite should never be used as a lubricant in the engine or the transmission, as it will have a tendency to short circuit the magneto.