2-8 LIMITATIONS / ENGINE OIL LIMITATIONS
ICON A5-B / PILOT’S OPERATING HANDBOOK CHANGE A1
CHAPTER 2
Mixing of Fuel Types
The A5-B fuel system is designed to allow mixing of automo-
tive fuel and AVGAS.
2.11 ENGINE OIL LIMITATIONS
Approved Oil Specifications
Viscosity—SAE 10W-40 multi-grade
API classification SG or higher
Registered brand heavy-duty four-stroke motorcycle oil with
gear additives
CAUTION: Do not use oils containing friction modifier
additives as this could result in clutch slip-
page.
CAUTION: Do not use conventional a.d. (ashless disper-
sant) aircraft oils.
CAUTION: Do not use oils intended primarily for diesel
engines.
CAUTION: Do not use any oil additives.
Recommended Oil
Shell brand AeroShell Sport Plus 4
2.12 ENGINE COOLANT LIMITATIONS
The engine coolant must be a mixture of 50% ethylene glycol based
antifreeze and 50% distilled water. The antifreeze portion of the
coolant mixture should be a low silicate and nitrite-free formula.
A list of approved antifreeze is included in the table below:
Brand Description
BASF Glysantin Protect Plus/G48
CASTROL Antifreeze All-Climate
CASTROL Antifreeze Anti-Boil
OMB OMB Coolant Plus
PETROL Antifreeze Concentrate/ Antifreeze G11
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