Page 259 of 398

NOTICE:
If you try to do your own service work without knowing enough
about it, your vehicle could be damaged.
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FUEL
Use regular unleaded gasoline rated at 87 octane or higher. It should
meet specifications
ASTM D4814 in the U.S. and CGSB 3.5-92 in
have to add anything to the fuel.
In the U.S. .and Canada, it’s easy to be sure you get the right kind of
gasoline. (unleaded). You’ll see “UNLEADED” right.
on the pump. And
Be sure the posted octane is at least
87. If the octane is less than 87, you
may get a heavy knocking noise when you drive. If it’s bad. enough, it can
damage your engine.
‘1 Canada. These fuels should have the proper additives, so you should not
I ’ only unleaded nozzles will fit into your vehicle’s filler neck.
i
If you’re using fuel rated at 87 octane or higher and you still hear heavy
knocking, your engine needs service. But don’t worry if you hear a little
pinging noise when you’re accelerating or driving up a. hill. That’s normal,
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Page 260 of 398

n and.you don’t have to buy a higher octane fuel to get rid of pinging. It’s
the heavy, constant knock that means you have a problem.
What about gasoline with blending materials that contain oxygen
(oxygenates), such
as MTBE or alcohol?
MTBE is “methyl tertiary-butyl ether.’’ Fuel that is no more than
15%
MTBE is fine for your vehicle.
Ethanol is ethyl or grain alcohol. Properly-blended fuel that is no more
than
10% ethanol is fine for your vehicle.
Methanol is methyl or wood alcohol.
NOTICE:
Fuel that is more than 5% methanol is bad for your.vehicle.
Don’t. use it. It can corrode metal parts in your fuel system and
also damage plastic and rubber.parts. That damage wouldn’t be
covered under your warranty. And even at
5% or less, there must
he “cosolvents” and corrosion preventers in this fuel to help
avoid these problems.
Gasolines for Cleaner Air
Your use of gasoline with deposit control additives will help prevent
deposits from forming in your engine and fuel system. That helps. keep
your engine in tune and your emission control system working properly.
It’s good for your vehicle, and you’ll be doing your part for cleaner air.
Many gasolines are now blended with oxygenates. General Motors
recommends that you use gasolines with these blending materials, such as
MTBE and ethanol. By doing
so, you can help clean the air, especially in
those parts
of the country that have high carbon monoxide levels.
~ In addition, some gasoline suppliers are now producing reformulated
gasolines. These gasolines are specially designed to reduce vehicle
emissions. General Motors recommends that you use reformulated
gasoline. By doing
so, you can help clean the air, especially in those parts
of the country that have high ozone levels.
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Page 389 of 398

Mirrors, Rear Seat Vanity ............................ 124
Monitors, Lamp .................................... 119
Mountain Drivlng .................................. 194
Mobile Telephone, Adding A ..................... 152,311
MTBE In Gasoline ................................. 247
Mud, If You’re Stuck In ............................. 244
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“N (Neutral) Gear Position .......................... 92
New Vehicle “Break-In” .............................. 85
Night, Driving At ................................... 185
Night Vision ....................................... 186
Notices About Damage ................................ 2
0
Occupant Restraint .................................. 20
Octane Required For Your Car ....................... 246
Odometer And Speedometer ......................... 131
Odometer, Trip .................................... 131
Off (Ignition Key Position) ............................ 86
Off Road Recovery ................................. 181
Oil Additives, Engine ............................... 260
Oi1,Engine ........................................ 254
Oil, What Kind of Oil to Use ......................... 257
Oil, When To Change Your Engine .................... 260
Oil Life Indicator. .................................. 145
OilQuality ........................................ 257
Oil Thickness (Viscosity) ............................ 258
Operating Record ....................... See Maint. Book
Operation In Foreign Countries
...................... 248
Outside Air ....................................... 146
Outside Temp ...................................... 147
Outside Mirrors .................................... 123
Overdrive, Automatic ................................ 92
Overheated, Engine ................................. 223
Owner Check & Services ................. See Maint. Book
Odometer
......................................... 131
P
“P”
(Park) Position .................................. 90
Paint S otting, Chemical ............................ 308
Parking On Hills ................................... 210
Park, S K ifting Into ................................... 96
Parking Brake ...................................... 94
Parking Over Thin s That Burn ........................ 99
Parking with a Trai f er ............................... 210
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