
The 1998 Oldsmobile  Achieva  Owner’s  Manual 
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Seats  and  Restraint  Systems 
This section tells you  how to use  your  seats and safety  belts  properly.  It  also explains the “SRS” system. 
Features  and  Controls 
This section explains  how to start and operate  your  vehicle. 
Comfort  Controls  and  Audio  Systems 
This section tells you  how to adjust the  ventilation  and  comfort controls and  how  to operate your audio system. 
Your  Driving  and  the  Road 
Here you’ll  find helpful information  and tips  about  the  road  and  how  to drive under different conditions. 
Problems  on the  Road 
This section tells  what to do  if  you  have a problem  while  driving, such  as a flat tire or overheated engine,  etc. 
Service  and  Appearance  Care 
Here the  manual  tells you how to keep your vehicle  running  properly  and  looking good. 
7- 1 Maintenance  Schedule 
This section tells you  when  to  perform  vehicle maintenance and  what fluids and lubricants to  use. 
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Customer  Assistance  Information 
This section tells  you  how  to contact Oldsmobile  for assistance  and  how to get  service  and owner publications. 
It  also gives  you information on “Reporting Safety Defects” on page 
8-8. 
Index 
Here’s  an alphabetical listing  of almost  every  subject in this manual. You can  use  it to  quickly  find 
something  you  want to read. 
i  

Maintenance  When  Trailer  Towing 
Your vehicle  will need  service more often when you’re 
pulling a trailer.  See  the Maintenance Schedule  for more 
on  this.  Things that  are  especially  important  in trailer 
operation  are  automatic transaxle  fluid (don’t overfill), 
engine  oil, belt, cooling system and brake adjustment. 
Each 
of these  is covered  in  this manual, and the Index 
will  help  you find them quickly.  If you’re trailering, it’s 
a good  idea  to  review  these  sections  before you 
start 
your trip. 
Check periodically  to 
see that all hitch nuts and bolts 
are tight. 
Engine  Cooling  When  Trailer  Towing 
Your  cooling system  may temporarily overheat during 
severe  operating  conditions. See “Engine  Overheating’’ 
in the Index. 
Towing A Trailer 
(Except 3100 Engine) 
Your  vehicle  is  neither designed nor intended to tow 
a trailer. 
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As shown in the chart, SAE 5W-30 is best for your 
vehicle.  However,  you can use 
SAE 1 OW-30 if it's  going 
to  be 
0" F (- 18 " C) or  above.  These  numbers on an oil 
container  show its viscosity,  or thickness. 
Do not  use 
other  viscosity  oils, such as 
SAE 20W-50. 
NOTICE: 
Use  only  engine  oil  with  the  American  Petroleum 
Institute  Certified  For  Gasoline  Engines 
"Starburst"  symbol.  Failure  to  use  the 
recommended  oil  can  result  in  engine  damage  not 
covered  by  your  warranty. 
GM  Goodwrench@  oil meets all the requirements  for 
your vehicle. 
If you  are in an area where  the temperature  falls 
below 
-20°F (-29"C), consider  using either  an 
SAE 5W-30 synthetic  oil  or an SAE OW-30 oil. Both 
will  provide  easier  cold  starting  and better protection 
for  your  engine  at extremely low temperatures. 
Engine  Oil  Additives 
Don't add anything  to your  oil. Your  retailer is ready  to 
advise  if  you think something should be  added. 
When  to  Change  Engine  Oil 
If any one of these  is true  for  you, use the short triplcity 
maintenance schedule: 
e 
0 
0 
e 
e 
Most  trips are less  than 5 to 10 miles (8 to 16 km). 
This is particularly  important when outside 
temperatures  are below freezing. 
Most trips  include  extensive  idling  (such as frequent 
driving in stop-and-go  traffic). 
Most trips  are through  dusty areas. 
You  frequently tow a trailer 
or use a carrier  on top of 
your vehicle. 
The  vehicle 
is used  for delivery service, police,  taxi 
or  other commercial application. 
Driving under these  conditions  causes  engine  oil  to 
break down sooner.  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 
occurs  first. 
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If none  of them is true, use the long  triphighway 
maintenance  schedule. Change the oil and filter every 
7,500 miles  (12 500 km) or 12 months -- whichever 
occurs  first. Driving 
a vehicle with a fully warmed 
engine  under highway conditions causes  engine oil to 
break down slower. 
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 retailer, a service station  or a local recycling 
center  for help. 
Air Cleaner 
The  air  cleaner  is located on the driver’s side  of the 
engine compartment. 
To check or replace the air filter: 
1. Unscrew the  four Phillips-head  screws,  then pull the 
cover back. 
2. Remove the air cleaner filter. 
3. Be  sure to install the air cleaner filter  and replace the 
cover tightly. 
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Refer to  the  Maintenance Schedule  to  determine when to 
replace  the  air  filter. 
See  “Scheduled Maintenance  Services”  in the Index. 
Operating the  engine  with the air cleaner  off can 
cause  you or others to be burned. The  air cleaner 
not  only  cleans  the 
air, it stops flame if the engine 
backfires. 
If it  isn’t  there, and the  engine 
backfires,  you  could  be  burned. Don’t drive with 
it 
off, and  be careful  working  on  the engine  with 
the  air cleaner  off. 
I NOTICE: 
If the air cleaner  is  off, a backfire can  cause a 
damaging  engine  fire.  And,  dirt can easily  get 
into your  engine,  which  will  damage it.  Always 
have  the air cleaner  in  place  when  you’re  driving. 
Automatic Transaxle Fluid 
When to Check and Change 
A good  time  to  check your automatic transaxle fluid 
level  is when the  engine oil is changed. 
Change both the fluid and filter every 
50,000 miles 
(83 000 km)  if the vehicle is mainly driven under  one 
or more 
of these conditions: 
0 In heavy city traffic where the  outside temperature 
regularly reaches 
90°F (32°C)  or  higher. 
In hilly or mountainous terrain. 
When  doing frequent trailer towing. 
Uses such as found in taxi, police  or delivery  service. 
If  you  do not  use  your vehicle under any  of these 
conditions, the  fluid and filter  do not require  changing. 
See  “Scheduled Maintenance  Services” 
in the Index. 
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NOTICE: (Continued) 
If your  tires  have  too  much air (overinflation), 
you 
can get  the  following: 
Unusual wear 
0 Bad  handling 
Rough  ride 
Needless damage  from  road  hazards. 
When 
to Check 
Check  your tires once  a  month or more. 
Don’t  forget  your  compact spare tire. It should be at 
60 psi (420 Wa). 
How to Check 
Use  a  good quality  pocket-type  gage  to  check tire 
pressure.  You can’t  tell if your tires  are properly  inflated 
simply  by looking  at  them. Radial  tires may look 
properly  inflated even when  they’re  underinflated. 
Be  sure  to  put the valve  caps back 
on the valve 
stems. They  help prevent  leaks by keeping  out  dirt 
and  moisture. 
Tire  Inspection  and  Rotation 
Tires  should  be rotated  every 6,000 to 8,000 miles 
(10 OOO to 13 O00 km). Any time  you  notice  unusual 
wear, rotate  your  tires as soon as possible  and  check 
wheel  alignment. 
Also check  for damaged  tires  or  wheels. 
See ‘When  It’s  Time  for New Tires” and ‘Wheel 
Replacement”  later in this section  for more  information. 
The  purpose  of regular  rotation  is  to  achieve more 
uniform wear  for 
all tires on the vehicle.  The  first 
rotation  is the  most important.  See “Scheduled 
Maintenance  Services”  in  the  Index  for  scheduled 
rotation  intervals. 
When  rotating  your tires, always  use the  correct  rotation 
pattern  shown  here. 
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Section 7 Maintenance  Schedule 
This  section  covers  the maintenance required  for your vehicle.  Your vehicle needs  these services  to retain  its safety, 
dependability  and emission  control  performance. 
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7-6  Introduction 
How 
This  Section  is Organized 
Part 
A: Scheduled Maintenance  Services 
Short  Trip/City  Definition 
Short  Trip/City  Intervals 
Long  TripMighway  Definition 
Long  Tripmighway  Intervals  7-7 
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Short 
Trip/City Maintenance Schedule 
Long Trip/Highway Maintenance  Schedule 
Part B: Owner  Checks and  Services 
Part 
C: Periodic  Maintenance Inspections 
Part 
D: Recommended  Fluids and Lubricants 
Part 
E: Maintenance Record  

How This Section is Organized 
The remainder of this section  is  divided  into  five  parts: 
“Part A: Scheduled Maintenance  Services” shows 
what  to have  done  and how  often.  Some 
of these 
services  can be complex, 
so unless you  are  technically 
qualified  and have  the  necessary  equipment,  you should 
let  your retailer’s  service department  or  another 
qualified  service  center  do these  jobs. 
Performing maintenance  work on a vehicle  can 
be  dangerous.  In trying to do  some jobs,  you can 
be  seriously  injured. 
Do your own maintenance 
work  only 
if you  have  the required  know-how 
and  the proper  tools and equipment  for the job. 
If you  have  any doubt,  have a qualified 
technician  do  the work. 
If you  are skilled enough  to  do  some work on your 
vehicle,  you will probably want to  get the  service 
information.  See “Service  and Owner  Publications” 
in 
the Index. 
“Part B: Owner  Checks  and Services” tells 
you  what  should  be checked and when.  It  also  explains 
what  you can easily  do  to  help  keep your vehicle in 
good  condition. 
“Part  C: Periodic Maintenance  Inspections” 
explains  important  inspections  that your retailer’s 
service  department  or  another  qualified  service  center 
should  perform. 
“Part D: Recommended  Fluids and Lubricants” lists 
some  recommended products to help keep your  vehicle 
properly maintained.  These products, 
or their 
equivalents,  should  be  used whether you do the work 
yourself  or have  it  done. 
“Part E: Maintenance  Record” provides  a place for 
you  to record  the maintenance performed on your 
vehicle. Whenever any maintenance is  performed, be 
sure  to  write it down  in this part.  This will help  you 
determine  when your next maintenance  should  be  done. 
In  addition,  it is a good  idea  to  keep your maintenance 
receipts.  They may be needed 
to qualify your vehicle  for 
warranty repairs. 
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