Jabiru Aircraft
Pilot Operating Handbook
Model J230-D
Revision:
6
28/2/2020
Page 88
8.5.1
Fuel Containing Alcohol
WARNING
For the reasons noted below Jabiru Aircraft do not recommend using any fuel containing
Ethanol. Operators who choose to use this fuel do so at their own risk.
CAUTION
Using a fuel which is not recommended may have detrimental effects on airworthiness,
maintenance and safety.
a. Early J230-D aircraft were equipped with fuel tanks sealed using a compound which is soluble
in alcohol. Using a fuel containing alcohol in these tanks will damage the sealant, leading to
fuel leaks. Later aircraft use a sealant which is compatible for use with fuels containing up to
10% Ethanol. Refer to Jabiru Service Letter JSL007 for details on how to determine which
sealant is which.
b. An operator planning to use any MOGAS must determine which sealant is used in their aircraft
and take measures to ensure only appropriate fuels are used.
c. Fuels containing alcohol are inherently unsuitable for use in aircraft due to the way they absorb
moisture from the air and change over time.
d. Further information on fuels
– including Ethanol content – is given in Jabiru Service Letter
JSL007. Any operator considering using MOGAS or an Ethanol blend fuel must read,
understand and follow the requirements it contains.
8.6 APPROVED OIL GRADES & SPECIFICATIONS
Jabiru Aircraft approves lubricating oils of any brand name conforming to specifications MIL-L-
6082 for straight mineral oil and
SAE J-1899
for ashless dispersant oil.
Straight mineral oil must be used during the first 25-50 hours of operation for new and overhauled
engines, or until the oil consumption has stabilised. After the first oil change it is recommended
that ashless dispersant oil be used.
8.6.1
Engine Oil Viscosity Grade:
The following chart is intended to assist in choosing the correct grade of oil and must be considered
as a guide only. Multiviscosity grades can also be used.
Average
Ambient Temperature
Mineral
Grades
Ashless Dispersant
Grades
Above 35
°
C (95
°
F)
SAE 60
SAE 60
15
°
C to 35
°
C
(59
°
to 95
°
F)
SAE 50
SAE 50
-17
°
C to 25
°
C
(1
°
to 77
°
F)
SAE 40
SAE 40
Equivalence of SAE and commonly used Commercial Grade designations:
SAE:
20
30
40
50
60
Commercial:
55
35
80
100
120
