Jabiru Aircraft
Pilot’s Operating Handbook
Model J120-C
JP-FM-10
Revision:
0
28 Nov 2007
Page 48 of 50
8.2 OIL
8.2.1
Engine Oil Specification:
Jabiru Aircraft approves lubricating oils of any brand name conforming to specifications MIL-L-
6082 for straight mineral oil and MIL-L-22851 for ashless dispersant oil.
Straight mineral oil must be used during the first 50 hours of operation for new and overhauled
engines, or until the oil consumption has stabilised. After the first 50 hours it is recommended
that ashless dispersant oil be used.
8.2.2
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 as indicated
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
8.3 BRAKES
The brakes of the J120-C use automotive brake fluid. Refer to the J120 Technical manual for
details of appropriate brake fluid specifications.
WARNING:
The JABIRU uses automotive brake fluid (DOT 3 or DOT 4). DO NOT use Aircraft hydraulic fluid
(mineral based) or damage to the brake system will result.