Ford Manual
We recommend only medium light high-grade gas engine oil for use in the Model T motor. A medium
light grade of oil is preferred as it will naturally reach the bearings with greater ease and consequently
less heat will develop on account of friction. The oil should, however, have sufficient body so that the
pressure between the two bearing surfaces will not force the oil out and allow the metal to come in actual
contact. Heavy and inferior oils have a tendency to carbonize quickly, also "gum up" the piston rings,
valve stems and bearings. In cold weather a light grade of oil having a low cold test is absolutely
essential for the proper lubrication of the car. Graphite should not be used as a lubricant in the engine or
the transmission as it will have a tendency to short-circuit the magneto.
How often should Oil be drained from Crank Case?
Answer No. 102
It is advisable to clean out the crank case by draining off the dirty oil when the new car has been driven
three hundred and fifty miles; thereafter it will only be necessary to repeat this operation about every
seven hundred and fifty miles. Remove the plug underneath the flywheel casing and drain off the oil. It is
desirable to occasionally flush the crank case by replacing the crankcase plug and putting two quarts of
lubricating oil into the motor and running the engine slowly for a few minutes; then remove crank case
plug and drain off the flushing oil, then replace plug and refill with fresh oil. (See Answer No. 3.)
How often should Commutator be oiled?
Answer No. 103
Keeping the commutator well oiled is a matter of far greater importance than many drivers believe, and
is necessary in order to have a smooth operating engine.
Don't be afraid to put a little oil into the commutator every other day---at least every 200 miles.
Remember that the commutator roller revolves very rapidly, and without sufficient lubrication the parts
soon become badly worn. When in this condition perfect contact between the roller and the four contact
points is impossible; as a result the engine is apt to misfire when running at a good rate of speed.
What about Lubricating the Differential?
Answer No. 104
Do not make the mistake of putting to much grease in the differential housing. The housing should not
be more than one-third full. The differential is supplied with the required amount of lubrication when the
car leaves the factory. The oil plug should be removed about every 1000 miles and more grease added if
necessary. If a fluid grease is used the level should be approximately one and one-half inches below the
oil hole.
How are Ford Tires removed?
Answer No. 105
