Excessive oil consumption (not due to leaks) is the use of
1.9 liters (2 quarts) of engine oil within 3 200 km
(2,000 mi). However, during initial engine break-in periods 4 828-6 437 km
(3,000-4,000 mi) oil consumption may exceed 1.9 liters
(2 quarts) or more. The causes of excessive oil consumption include
the following conditions:
| • | External oil leaks. Tighten the bolts and/or replace gaskets and
oil seals as necessary. |
| • | Incorrect oil level or improper reading of oil level indicator.
With the vehicle on a level surface, allow adequate drain down time and check
for the correct oil level. |
| • | Improper oil viscosity. Use recommended SAE viscosity for the
prevailing temperatures. |
| • | Continuous high speed driving and/or severe usage. |
| • | Crankcase ventilation system restrictions or malfunctioning components. |
| • | Valve guides and/or valve stem oil seals worn, damaged, or the
seal omitted. Ream the valve guides and install oversize service valves and/or
new valve stem oil seals. |
| • | Piston rings broken, improperly installed, worn, or not seated
properly. Allow adequate time for the piston rings to seat. Replace broken
or worn piston rings as necessary. |
| • | Piston improperly installed or miss-fitted. |
