Z06 models have a racetrack-ready dry sump
engine lubrication system. This high-performance
system operates differently than a standard
engine lubrication system and requires a special
procedure when checking the engine oil level.
Follow this procedure closely when checking the
engine oil level.
The engine oil level must be checked when the
engine is warm. Cold oil level in the dry sump tank
may not indicate the actual amount of oil in the
system. With this system, engine oil is contained in
an external tank, separate from the engine.
Under normal operating conditions, the oil pan
under the engine does not store any oil. If
the vehicle has been parked for an extended
period without the engine being started, some oil
will seep back into the oil pan, reducing the
amount of oil held in the dry sump tank and there
could be no engine oil at all showing on the
dipstick. This is normal since the dipstick is
designed to read engine oil level only after the
engine has run long enough to reach normal
operating temperature.
Do not add engine oil based on cold engine
dipstick readings. The engine oil level on the
dipstick will also be inaccurate if checked while the
engine is running.
1. To obtain an accurate engine oil level
reading, warm up the engine to at least
175°F (80°C). Cold oil will not give a correct
oil level reading.
2. Once the engine is warm, turn off the engine.
Checking the oil while the engine is running
will result in an incorrect oil level reading.
3. Wait at least five minutes (but not more than
20 minutes) to allow oil to drain and settle in
the engine.
4. Remove the dipstick from the external engine
oil tank and clean it with a lint-free paper
towel or a cloth. Re-insert the dipstick into the
external oil tank, pushing it all the way in
until it stops.
5. Remove the dipstick from the oil tank and
read the level on the cross-hatched area.
Oil levels that fall in the cross-hatched area
are normal.
333
To Next Page
