Engine Oil (5.5L Lt6/Lt7 Engine) - Chevrolet CORVETTE ZR1 2025 Owner's Manual

4. Engine Coolant Surge Tank and Pressure
Cap. See Cooling System (Engine)
3 280 Cooling System (Electrified
Propulsion) 3 283 Cooling System (ZR1
Charge Air) 3 285.
5. Dry Sump Engine Oil Tank and Fill Cap.
See Engine Oil (5.5L LT6/LT7 Engine)
3 269 Engine Oil (6.2L LT2 Engine) 3 272.
6. Engine Oil Dipstick. See Engine Oil (5.5L
LT6/LT7 Engine) 3 269 Engine Oil (6.2L LT2
Engine) 3 272.

Engine Oil (5.5L LT6/LT7 Engine)

To ensure proper engine performance and long
life, pay careful attention to engine oil. Follow
these important steps:
•
Use engine oil approved to the proper
specification and of the proper viscosity
grade. See "Selecting the Right Engine Oil"
later in this section.
•
Check the engine oil level regularly and
maintain the proper oil level. See "Checking
Engine Oil" and "When to Add Engine Oil"
later in this section.
•
Change the engine oil at the appropriate
time. See Engine Oil Life System 3 275.
•
Always dispose of engine oil properly. See
"What to Do with Used Oil" in this section.
Checking the Engine Oil
1. Engine Oil Dipstick
2. Engine Oil Fill Cap
Check the engine oil level regularly, every 650
km (400 mi), especially prior to a long trip. To
get an accurate reading, the vehicle must be
parked on a level ground.
The engine oil dipstick handle is a loop.
See Engine Compartment Overview 3 251 for
the location.
Vehicle Care
The vehicle has a race track-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.
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. 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. This will reduce the
amount of oil held in the dry sump tank and
there could be no engine oil on the dipstick.
This is normal since the dipstick is designed to
read the 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 must be checked while the
engine is running at idle.
To check the engine oil:
1. Turn the engine on and let it warm up to at
least 80 °C (175 °F).
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