1999 Mercury Grand Marquis octane

Do not use gasolines containing methanol. It can damage critical fuel
systems components.
Vehicles certified to meet California emission standards (indicated on the
underhood Vehicle Emissions Control Information label) are designed to
operate on California cleaner-burning, low-sulfur gasolines. If you have a
California-certified vehicle and California cleaner-burning gasoline is not
available when you refuel, your engine should perform adequately.
However, the performance of the emission control devices and systems
may be adversely affected. In New York and Massachusetts, which have
adopted California's emission standards without requiring the sale of
California cleaner-burning gasoline, repairs to correct the effects of using
non-California fuel may not be covered by the emissions warranty.
Your vehicle was not designed to use fuel or fuel additives with metallic
compounds, including manganese-based compounds containing (MMT).
Repairs to correct the effects of using a fuel for which your vehicle was
not designed may not be covered by your warranty.
Octane recommendations
Your vehicle is designed to use
ªRegularº unleaded gasoline with an
(R+M)/2 octane rating of 87. We do
not recommend the use of gasolines
labeled as ªRegularº that are sold
with octane ratings of 86 or lower in high altitude areas.
Do not be concerned if your engine sometimes knocks lightly. However, if
it knocks heavily under most driving conditions while you are using fuel
with the recommended octane rating, see your dealer or a qualified
service technician to prevent any engine damage.
Fuel quality
If you are experiencing starting, rough idle or hesitation driveability
problems during a cold start, try a different brand of ªRegularº unleaded
gasoline. ªPremiumº unleaded gasoline is not recommended (particularly
in the United States) because it may cause these problems to become
more pronounced. If the problems persist, see your dealer or a qualified
service technician.
It should not be necessary to add any aftermarket products to your fuel
tank if you continue to use a high-quality fuel.
87(R+M)/2 METHOD
Maintenance and care
160

the Indicated Capacity and the Empty Reserve combined. Indicated
Capacity is the difference in the amount of fuel in a full tank and a tank
when the fuel gauge indicates empty. Empty Reserve is the small amount
of usable fuel remaining in the fuel tank after the fuel gauge indicates
empty.
The amount of Empty Reserve varies and should not be relied
upon to increase driving range. When refueling your vehicle after
the fuel gauge indicates empty, you might not be able to refuel
the full amount of the advertised capacity of the fuel tank due to
the empty reserve still present in the tank.
Filling the tank
For consistent results:
²Use the same filling rate setting (low Ð medium Ð high) each time
the tank is filled.
²Allow three automatic click-offs when filling.
²Always use the recommended octane rating of a known quality
gasoline, preferably a national brand.
²Use the same side of the same pump and have the vehicle facing the
same direction each time you fill up.
²Have the vehicle loading and distribution the same every time.
Your results will be most accurate if your filling method is consistent.
Calculating fuel economy
1. Fill the fuel tank completely and record the initial odometer reading.
2. Each time you fill the tank, record the amount of fuel added (in liters
or gallons).
3. After at least three to five tank fill-ups, fill the fuel tank and record
the current kilometer (mileage) reading.
4. Follow one of the simple calculations in order to determine fuel
economy:
Multiply liters used by 100, then divide by total kilometers
traveled.
Divide total miles traveled by total gallons used.
Keep a record for at least one month and record the type of driving (city
or highway). This will provide an accurate estimate of the vehicle's fuel
Maintenance and care
162

Item Ford part
nameFord part
numberFord
specification
Rear axle
lubricant
1Motorcraft SAE
80W90 Premium
Rear Axle
LubricantXY-80W90-QL WSP-M2C197_A
Windshield
washer fluidUltra-Clear
Windshield
Washer
ConcentrateC9AZ-19550-AC ESR-M17P5-A
1Add 118 ml (4 oz.) of additive friction modifier C8AZ-19B546±A, Ford
specification EST-M2C118±A for complete refill of Traction-Lok axles.
ENGINE DATA
Engine 4.6L V8 engine
Cubic inches 281
Horsepower-single exhaust 200 @ 4250 rpm
Horsepower-dual exhaust 215 @ 4500 rpm
Torque-single exhaust 275 lb.-ft. @ 3000 rpm
Torque-dual exhaust 285 lb.-ft. @ 3000 rpm
Recommended fuel 87 octane
Firing order 1-3-7-2-6-5-4-8
Spark plug gap 1.3-1.4 mm (0.052-0.056 inch)
Ignition system Coil on plug
Compression ratio 9.0:1
VEHICLE DIMENSIONS
Vehicle dimensions mm (in)
(1) Overall length 5 382 (211.9)
(2) Overall width 1 987 (78.2)
(3) Overall height 1 443 (56.8)
(4) Wheelbase 2 913 (114.4)
(5) Track - Front 1 611 (63.4)
(5) Track - Rear 1 659 (65.3)
Capacities and specifications
177

detergent in fuel .....................161
filling your vehicle
with fuel ...........................157,159
quality ......................................160
running out of fuel .................161
safety information relating to
automotive fuels .....................157
Fuses ...................................121,122
Gas mileage (see Fuel
economy) ..............161,162,163,164
Gauges .........................................12
battery voltage gauge ...............16
engine coolant
temperature gauge ...................15
engine oil pressure gauge ........16
fuel gauge ..................................12
odometer ...................................14
speedometer .............................13
trip odometer ............................15
Hazard flashers .........................120
Head restraints ......................80,81
Headlamps
aiming ......................................170
bulb specifications ..................170
high beam ..............................9,24
Heating ........................................26
heating and air
conditioning system ............26,27
Hood ..........................................137
Ignition .......................................177
Inspection/maintenanc e(I/M)
testing ........................................166
Instrument panel ..........................6
cleaning ...................................173
Keyless entry system
keypad .......................................77
programmin gentry
code .................................77,78,79
Keys
positions of the ignition ...........56
Lamps
autolamp system .......................25daytime running light ...............25
headlamps .................................24
headlamps, flash to pass ..........24
instrument panel, dimming .....24
interior lamps .........................169
replacing bulbs ..166,167,168,169
Lane change indicator
(see Turn signal) ...................55,56
Lights, warning and indicator ......6
air bag ..........................................8
air suspension ...........................10
anti-lock brakes (ABS) .........9,22
brake .......................................8,23
charging system ..........................9
low coolant ................................10
low fuel ........................................6
oil pressure .................................9
overdrive off ..............................10
safety belt ...................................8
speed control ............................61
traction control active .........11,22
turn signal indicator ...................9
Locks
childproof ..................................70
Lumbar support, seats ...............84
Message center ...........................17
reset button .........................17,18
select button .............................18
Mirrors
automatic dimming
rearview mirror .........................65
side view mirrors (power) .......69
Motorcraft parts ........................161
Octane rating ............................160
Overdrive .....................................57
Parking brake ............................107
Power distribution box (see
Fuses) ........................................124
Power door locks ...................69,72
Power steering ...................110,111
fluid, checking and adding ....147
Index
194

Recommended fuel Unleaded fuel only - 87 octane
Fuel tank capacity 71.9L (19.0 gallons)
Engine oil capacity (includes filter
change)4.7L (5.0 quarts). Use Motorcraft
5W30 Super Premium Motor Oil,
Ford specification WSS-M2C153-G.
Tire pressure and size Refer to the Certification Label
located on the driver's door.
Hood release Pull handle under the left side of
the instrument panel.
Coolant capacity
115.0L (15.8 quarts)
Automatic transmission fluid
capacity13.1L (13.9 quarts). Use
Motorcraft MERCONtV ATF.
Power steering fluid capacity
2Fill to line on reservoir. Use
Motorcraft MERCONtAT F.
1Use Ford Premium Engine Coolant (green in color). DO NOT USE Ford
Extended Life Engine Coolant (orange in color). Refer toAdding engine
coolant, in the Maintenance and Care chapter.
2Ensure correct automatic transmission fluid is used for a specific
application. Check the container to verify the fluid is MERCONtand/or
MERCONtV approved. Some fluids have been approved as meeting both
MERCONtand MERCONtV requirements and will be labeled as such.
Fluids labeled as meeting only MERCONtor only MERCONtV
requirements must not be used interchangeably. DO NOT mix MERCONt
and MERCONtV. Transmission fluid requirements are indicated on the
dipstick or on the dipstick handle. Refer to your Scheduled Maintenance
Guide to determine the correct service interval.
Filling station information
200