Minimize Oil Dilution and Sludge
The crankcase is provided with a cross ventilation system to reduce harmful dilution of the engine oil by water and fuel. Crankcase dilution is aggravated by low speed driving with frequent stops and starts because the engine does not warm up to the normal operating temperature. The driver can materially assist in preventing this condition by observing the following suggestions:
1. After starting, give the engine time to warm up before driving.
2. Keep the engine in good mechanical condition. See that the compression is good and that the ignition and carburetion systems are kept in peak condition.
3. Clean the crankcase at least once a year, preferably when winter oil is changed for summer weight oil.
4. Use the proper grade of a reputable engine oil.
5. Use a good grade of fresh gasoline.
6. Check thermostat operation.
Operating an engine at subnormal temperatures causes a much more rapid dilution of the crankcase oil than is experienced at normal temperatures.