ICON A5, Pilot Operating Handbook

Page: 25 / 161

LIMITATIONS / FUEL LIMITATIONS 2-8
CHANGE A2 ICON A5 / PILOT’S OPERATING HANDBOOK
CH
AP
TER 2
Approved Types of Fuel
a) Unleaded automotive fuel with up to 10% maximum
ethanol content meeting ASTM D4814 with minimum
RON 95 (minimum Anti-Knock Index 91)
b) Grade 100LL aviation gasoline (AVGAS) meeting ASTM
D910
NOTE
: Use of leaded gasoline decreases the mainte-
nance interval for changing the oil filter,
cleaning the oil tank, and replacing spark
plugs. See the A5 Maintenance Manual for
further information.
NOTE
: Anti-Knock Index is (RON+MON)/2. RON is
Research Octane Number and MON is Motor
Octane Number.
CAUTION
: Due to various environmental, economic, and
political reasons, fuels with different blends
of ethanol, oxygenators, and other additives
may be encountered when using automotive
gasoline. Be careful to use only fuel suitable
for your operational climate zone since there
is a risk of fuel vapor formation if using
winter-blend, or other high vapor pressure
fuel, in summer-type weather or at high alti-
tude. Vapor formation can result in fuel pump
cavitation, low fuel pressure, and engine
power loss. This phenomenon is most likely
to be encountered in a full throttle climb at
high altitude and in hot weather. An occa-
sional flash of the fuel pressure annunciator
light is acceptable, but if the fuel pressure
light flashes frequently, continuously, or if any
sort of power loss, stumbling or surging is
observed, land as soon as practical and
contact ICON Owner Support. The problem
may be poor fuel quality or an inappropriate
blend of automotive fuel. If these are the case
then 100LL Aviation fuel should be used until
a suitable type of automotive fuel can be
sourced.