Fuel System; Fuel Requirements; Gasoline/Oxygenate Blends - Chrysler 1998 Viper RT/10 Owner's Manual

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FUEL SYSTEM 14 -1
FUEL SYSTEM
C O N T E N T S
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FUEL DELIVERY SYSTEM 3
FUEL INJECTION SYSTEM . . . . . . . . . . . . . . . . . 17
GENERAL INFORMATION
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INDEX
G E N E R A L I N F O R M A T I O N
F U E L R E Q U I R E M E N T S
G A S O L I N E / O X Y G E N A T E B L E N D S
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I N T R O D U C T I O N 1
L O N G - T E R M S T O R A G E 2
G E N E R A L I N F O R M A T I O N
INTRODUCTION
Throughout this group, references may be made to
a particular vehicle by letter or number designation.
A chart showing the breakdown of these designations
is included i n the Introduction Section at the front of
this service manual.
The Evaporation Control System, is also considered
part of the fuel system. The system reduces the emis-
sion of fuel vapor into the atmosphere.
The description and function of the Evaporation
Control System is found i n Group 25 of this manual.
FUEL REQUIREMENTS
The Dodge Viper was designed to meet a l l emission
regulations and provide excellent fuel economy w h e n
using h i g h quality p r e m i u m unleaded gasoline. O n l y
use u n l e a d e d g a s o l i n e w i t h a m i n i m u m p o s t e d
o c t a n e o f 9 1 .
L i g h t spark knock at low engine speeds is not
harmful to your engine. However, continued heavy
spark knock at high speeds can cause damage and
should be reported to your dealer immediately.
Engine damage resulting from operating w i t h a
heavy spark knock may not be covered by the new
vehicle warranty.
I n addition to using p r e m i u m unleaded gasoline
w i t h the proper octane r a t i n g , gasolines t h a t contain
detergents, corrosion and stability additives are rec-
ommended. U s i n g gasolines t h a t have these additives
w i l l help improve fuel economy, reduce emissions,
and m a i n t a i n vehicle performance. Generally, pre-
m i u m unleaded gasolines contain more additive t h a n
regular unleaded.
Poor quality gasoline can cause problems such as
h a r d starting, stalling, and stumble. I f you experi-
ence these problems, t r y another brand of gasoline
before considering service for the vehicle.
GASOLINE/OXYGENATE BLENDS
Some fuel suppliers blend unleaded gasoline w i t h
materials t h a t contain oxygen such as alcohol, M T B E
(Methyl Tertiary B u t y l Ether) and E T B E ( E t h y l Ter-
t i a r y B u t y l Ether). Oxygenates are required i n some
areas of the country d u r i n g w i n t e r months to reduce
carbon monoxide emissions. The type and amount of
oxygenate used i n the blend is important.
The following are generally used i n gasoline
blends:
E t h a n o l - ( E t h y l or G r a i n Alcohol) properly
blended, is used as a m i x t u r e of 10 percent ethanol
and 90 percent gasoline. Gasoline blended w i t h etha-
nol may be used i n your vehicle.
M T B E / E T B E - Gasoline and M T B E (Methyl Ter-
t i a r y B u t y l Ether) blends are a m i x t u r e of unleaded
gasoline and up to 15 percent M T B E . Gasoline and
E T B E (Ethyl Tertiary B u t y l Ether) are blends of gas-
oline and up to 17 percent E T B E . Gasoline blended
w i t h M T B E or E T B E may be used i n your vehicle.
M e t h a n o l - Methanol (Methyl or Wood Alcohol) is
used i n a variety of concentrations blended w i t h
unleaded gasoline. You may encounter fuels contain-