Materials Added To Fuel; Gasoline/Oxygenate Blends; DO NOT use E-85, gasoline containing methanol, or- Page 435

2018 Jeep Wrangler JK Owner Manual

Table of Contents

GETTING TO KNOW YOUR VEHICLE
GETTING TO KNOW YOUR INSTRUMENT PANEL
SAFETY
OCCUPANT RESTRAINT SYSTEMS
STARTING AND OPERATING
SERVICING AND MAINTENANCE
MULTIMEDIA
UCONNECT PHONE — IF EQUIPPED
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Materials Added To Fuel

Besides using unleaded gasoline with the proper octane

rating, gasolines that contain detergents, corrosion and

stability additives are recommended. Using gasolines that

have these additives will help improve fuel economy,

reduce emissions, and maintain vehicle performance.

Designated TOP TIER Detergent Gaso-

line contains a higher level of detergents

to further aide in minimizing engine

and fuel system deposits. When avail-

able, the usage of TOP TIER Detergent

gasoline

is

recommended.

Visit

www.toptiergas.com for a list of TOP

TIER Detergent Gasoline Retailers.
Indiscriminate use of fuel system cleaning agents should be

avoided. Many of these materials intended for gum and

varnish removal may contain active solvents or similar

ingredients. These can harm fuel system gasket and dia-

phragm materials.

Gasoline/Oxygenate Blends

Some fuel suppliers blend unleaded gasoline with oxygen-

ates such as ethanol.

CAUTION!

DO NOT use E-85, gasoline containing methanol, or
gasoline containing more than 15% ethanol (E-15). Use
of these blends may result in starting and drivability
problems, damage critical fuel system components,
cause emissions to exceed the applicable standard,
and/or cause the “Malfunction Indicator Light” to
illuminate. Please observe pump labels as they should
clearly communicate if a fuel contains greater than 15%
ethanol (E-15).

Problems that result from using gasoline containing more

than 15% ethanol (E-15) or gasoline containing methanol

are not the responsibility of the manufacturer and may

void or not be covered under New Vehicle Limited War-

ranty.

9

TECHNICAL SPECIFICATIONS

433

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