TB 55-9150-200-24
Section III. RECIPROCATING ENGINE LUBE OILS
3-10. Standard Oils.
a. Standard oils for reciprocating engines are specified in table 3-2.
b. During cross-country flights. use tables 3-3, 3-4, and 3-5 for the commercial oil conforming to the grade and
specification required. Such local purchase oil must not contain detergent additives, but may contain dispersant
additives if replenishing a dispersant oil such as MIL-L-22851. MIL-L-22851 ashless dispersant oil is designed to hold
newly formed sludge in suspension. It does not soften or disturb caked sludge which has previously settled out.
3-11. Alternate Oil.
a. MIL-L-6082 oil is an alternate for MIL-L22851.
b. In order to prevent clogging by the sludges which may be formed while using MIL-L6082, the following procedure
may be used when changing back to MIL-L-22851:
(1) Clean all strainers first.
(2) Add dispersant oil MIL-L-22851 to the MIL-L-6082 oil already in the crank-case, as needed; these oils are
(3) Check oil strainers every 10 hours for cleanliness over a period of 50 hours operation, and then revert to
the normal oil change schedule.
(4) At scheduled oil change, clean strainer prior to filling with dispersant oil and ground run the engine for 20
minutes. Check strainers for sludge; if contaminated, clean and repeat ground run until strainers are clean. After first
flight, arid after every 10 flight hours thereafter. Check screens until clean.
(5) It is to be noted that the desludging method outlined above is not a purging procedure, but a gradual
process.
(6) If major sludge problems occur that cannot be corrected by the above procedure, contact Commander,
USAAVSCOM, ATTN: DRSAVFEP for a desludging procedure.
Section IV. TABLES, LUBRICATING OILS.
Table 3-1. Lubricating Oils, Turbine Engine Aircraft
Note:
If there is a conflict between specific aircraft manuals and this table, the aircraft manual takes
precedence.
Fixed Wing Aircraft
Aircraft
Engine
Engine oils
Transmission and
gear oils
Seasonal Temperature
Seasonal Temperature
Limits and Specifications
Limits and Specifications
(see Notes 1 and 2)
(see Notes 1 and 2)
(MOHAWK)
Above -32 (-25 )
OV-1B
T53-L-7/A
C
F
Part of engine oil
use MIL-L-23699
system Same
Below -32 (-25 )
C
F
use MIL-L-7808
Same
OV-1C
T53-L-7/A/15
Same
Same
OV-1D
T53-t-701
Same
Same
RV-1D
Same
Same
Same
3-5