TOYOTA Prius HSD - Manual (Page 26)

Overfilling This is an unfortunate reality that far too much owners have to face. Oil pumped from bulk barrels
into your engine is commonly not carefully measured by dealers and quick oil-change places. So
make sure to check the level yourself after the service is complete. If the oil-level is beyond "full",
insist that they remove the excess.
The ideal level is 1/4” (one-quarter inch or 6 millimeters) below the "full" mark, which is between
the
D and the E on the photo above.
Too much oil causes MPG to be reduced. Way too much oil causes damage to the engine. So it is
in your best interest to make sure the oil-level never goes above the "full" marker on the dipstick.
3.9 quarts (3.7 liters) is the maximum capacity, so there is no need to ever use that much. Never
pour in more than 3.5 quarts (3.3 liters). Even less is better. It's easy to add more afterward.
Removing too much is very, very difficult.
A simple way to avoid overfilling problems is to provide your own oil (which is common for those
preferring synthetic anyway) instead. They'll just deduct the price difference from your bill. Only
supplying the mechanic with the correct amount will guarantee they won't overfill.
Engine Air-Filter
Checking Replacement every 30,000 miles (about 48,000 km) is recommended. But you’ll want to check it
sooner, especially if routinely you drive through areas with a lot of dust (like on dirt roads). The
more restricted the air flow becomes due to particles being collected, the more of a negative impact
that has on MPG. So for some owners, time may be a better determination of when to check rather
than distance.
Replacement Included with the filter is the rubber gasket. You’ll want to replacement both during the routine
change. The process itself literally only takes a minute for both, and no tools are required. The
black plastic housing which holds filter is located directly above the engine (left side under the
hood). Just look for the 3 black metal clips. Unlatch each and lift up. You’ll be looking directly at
the filter at that point. Simply remove & replace it.
Note that concealed within the top of the plastic housing is a secondary filter. It is a lifetime carbon
type, so just ignore it. No replacement of that one is ever needed.
(Toyota Part # 17801-21040)
Prius User-Guide 26 of 54 Last Updated: 9/01/2007