Saab 1987 900 Owner's Manual page 53

Engine oil and filter
The engine oil and filter should be changed
every 7,500 miles in accordance with the
maintenance schedule except in the case of
the Turbo. The Turbo requires engine oil
and filter changes every 3,750 miles. Follow
the Turbo oil change recommendations
also for naturally aspirated engines ifthese
models are operated under severe driving
conditions (extensive idling, stop-and-go
driving, and/or driving in cold climates over
repeated short trips without sufficient
engine warm-up). The use of extra additi-
ves in the oil is not recommended, especi-
ally in turbocharged engines.
Changing the engine oil and filter
1. Drain the engine oil when the oil is still
warm. Warm oil drains faster and more
thoroughly.
NOTE! Do not confuse the engine and
transmission drain plugs. Do not operate
the engine with the oil fill cap removed or
loosely installed. Oil spilled over the
engine creates a fire hazard.
Car care and scheduled maintenance 51
Skid pla te removed to show engine oil drain plug
(manual)
Skid plate removed to show engine oil drain plug
(automatic)
2 If necessary remove the air intake pipe
(use special driver, Torx T25, Turbo
only) and unscrew the oil filter using a
special oil filter wrench. Always change
the oil filter whenever the engine oil is
changed.
3 Apply clean engine oil to the rubber gas-
ket ofthe filter and tighten in accordan-
ce with the instructions on the label of
the long life Saab oil filter (Saab No.
9309576).
4 Reinstall the engine drain plug and the
air intake pipe.
5 Fill the crankcase with the appropriate
quantity and grade of engine oil. Start
the engine and check for leaks.
NOTE! There may be some valve noise
for the first few seconds of running after
an oil change. This is normal and the
noise will disappear once the engine oil
has reached proper working pressure.
Transmission oil
The transmission and differential are loca-
ted beneath the engine and assembled to
form an integral unit with the engine. Part
ofthe transmission case serves as the engine
oil sump. The forward part of the transmis-
sion comprises a primary gear case which