Buick 1994 Roadmaster Owner's Manual page 237

Engine Oil Additives Engine .Coolant Warmer
Don't add anything to your oil. Your Buick dealer is
,
(Engine Block Heater)
ready to advise if you think something should be added. An engine coolant warmer can be a big help if
you
have
When to Change Engine Oil
See if any one of these is true for you: Coolant Warmer" in the Index.
to park outside in very cold weather, 0
O F
(-
18
O
C) or
colder. If your vehicle'has this option, see "Engine
0
Most trips are less than 4 miles (6 km).
0
It's below freezing outside.and most trips are less
than 10 miles (16 km).
The engine is at low speed most of the time (as in
You tow a trailer often.
door-to-door delivery, or in stop-and-go traffic).
@
Most trips are through dusty places.
If any one of these is true for your vehicle, then'you
need to change your oil and filter every 3,000 miles
' ( 5 000 km) or 3 months -- whichever comes first..
(See "Change Oil Indicator" in the Index.)
If none of them is true, change the oil every 7,500 miles
(12 500
km)
or 12 months -- whichever comes first.
Change the filter at the first oil change and at every
other oil change after that.
(See "Change Oil Indicator'' in the Index.)
What to Do with Used Oil
Did you know that used engine oil contains certain
elements that may be unhealthy for your skin and could
even cause cancer? Don't let used oil stay on your skin
for very long. Clean your skin and nails with soap and
water, or a good hand cleaner. Wash or properly throw
away clothing or rags containing used engine oil. (See
the manufacturer's warnings about the use and disposal
of oil products.)
Used oil can be a real threat to the environment. If you
change your own oil, be sure to drain all free-flowing
oil from the filter before disposal., Don't ever dispose of
oil by putting it in the trash, pouring it on the ground,
into sewers, or into streams or bodies of water. Instead,
recycle it by taking it to a place that collects used oil. If
you have a problem properly disposing of your used oil,
ask your dealer, a service station or a local recycling
center for help.