Recommended Procedure
Check the maintenance records for correct oil type and viscosity for the vehicle operating temperature. Oil that has had extended drain intervals has increased viscosity (becomes thicker) and makes engine cranking more difficult and starting less reliable at temperatures below freezing. Refer to the lube oil chart in the Workshop article or Owner's Literature for the correct oil selection for temperature conditions.
Check for the correct oil level using the dipstick with the vehicle on level ground.
If the oil level on the dipstick is overfull, it is possible the engine was incorrectly repaired or fuel or coolant is diluting the oil and filling the crankcase. Recheck the oil level. Remove and clean the dipstick. Reinsert the dipstick into the dipstick tube until only the dipstick handle touches the top of the dipstick tube.
If the engine oil level is overfull (above the arrow as indicated) due to diesel fuel contamination, carry out the High Pressure Fuel System Test.