Mazda RX-7 1989 Owner's Manual page 8

9 7U 1-0070E
FUEL REQUIREMENTS
Your new Mazda is designed to obtain maximum performance with
UNLEADED GASOLINE with an octane rating (anti-knock index)
of 87 or higher (average of Research Octane Number and Motor
Octane Number}. Octane Rating is requ ired to be posted on the
pumps of gas stations by federal law in the United States.
Be aware that use of fuel that has a lower octane rating than re-
quired by your vehicle could cause the emission control system
to lose its effectiveness and could cause engine knoc k or serious
engine damage.
Unleaded gasoline will minimize exhaust emissions and spark plug
fouling.
CAUTION
NEVER USE LEADED GASOLINE. Never add any fuel system
cleaning agents to the fuel tank other than Mazda specified or
equivalent. (Consult your Authorized Mazda Dealer for details.) Use
of leaded gasol ine is detrimental to the catalytic converter.
Leaded gasoline will damage the oxygen sensor (if equipped) and
affect emission control.
Gasohol, a mixture of gasoline and ethanol (also known as g rain
alcohol), and gasoline or gasohol containing methanol (also known
as wood alcohol) are being marketed in various places in the coun-
try along with or instead of leaded or unleaded gasoline.
Do not use gasohol containing more than
10%
ethanol , or gaso-
line or gasohol containing any methanol, because the use of such
fuel may cause problems in driveability and damage to the fuel
system.
Discontinue using gasohol if driveability problems occur.
1-4
Damage or driveability problems on your Mazda resulting from
the use of
1) gasohol containing more than 10% ethanol;
2) gasoline or gasohol containing methanol;
or
3) leaded gasoline or leaded gasohol
may not be covered by the manufacturer's warranty applicable
to your Mazda.
97U1-0080E
EMISSION CONTROL SYSTEM
Any modification to the original-equipment emission control sys-
tems prior to fi rst sale and registration of a new vehicle is subject
to penalties under Federal law in the United States. Any such
modifications made thereafter may also be subject to penalties in
some states.
97U 1·0090 E
MOBILE TWO-WAY RADIO SYSTEM
If a mobile two-way radio system is instal1ed improperly,
or
if a
w rong type is used, the fuel injection system, the cru is~ control
system and other systems may be affected. To avoid any dam-
age to your vehicle, be sure to check with an Authorized Mazda
Dealer for proper installation of a mobile two-way radio.