Toyota prius Owner's Manual page 425

Engine oil
With the engine at operating temperature and turned off, check the oil
level on the dipstick.
 Checking the engine oil
Park the vehicle on level ground. After warming up the engine
STEP 1
and turning off the hybrid system, wait more than 5 minutes
for the oil to drain back into the bottom of the engine.
STEP 2
Wipe the dipstick clean.
STEP 3
Flat dipstick: Reinsert the dipstick fully.
STEP 4
STEP 4
Holding a rag under the end, pull the dipstick out and check
STEP 5
the oil level.
PRIUS_OM_OM47871E_(EE)
4-3. Do-it-yourself maintenance
Holding a rag under the end, pull
the dipstick out.
Non-flat dipstick: Reinsert the
dipstick fully with its protruding
areas ( in the illustration)
pointing towards the engine.
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