946 mL – 1 U.S. Quart - BP

P roduct Description
BPTO 2380 is a synthetic oil having a viscosity of 5
centistokes at 210°F that is approved against US
military specification MIL-PRF-23699F-STD, DEF STAN
91-101/2* (DERD 2499), and meets the requirements of
most jet engines and associated accessories. It is a
Type II oil which provides a more balanced combination
of thermal and oxidation stability, load-carrying capacity,
lower volatility and low temperature flow characteristics
than other 5 cSt jet engine oils. These features provide
long trouble-free performance under most conditions.
Synthetic oils of this type are not all identical. The
performance advantages of BPTO 2380 are achieved by
careful selection and balance of basestocks and
additives to provide the desired performance.
Details of laboratory analyses of physical, chemical,
and performance properties are provided in the
Appendix. Significant performance properties are
discussed below. Where detailed information on the
laboratory test methods and the significance of results
is desired, a member of our BP technical staff will be
happy to provide them.
V I S C O S I T Y : While most Type II synthetic turbo oils
have essentially the same viscosity at 99°C (between 5
and 5.5 centistokes), BPTO 2380 is less viscous at very
cold temperatures than other Type II oils. This offers a
distinct advantage, which permits BPTO 2380 to be
used in some critical applications where other Type II
oils are excessively viscous. For example, at -40°C the
viscosity of BPTO 2380 is well below that of
competitive products.
Competitive Products
BPTO 2380 A B
Viscosity, cSt
at -40°C 7950 12 , 390 10 , 640
VAPOR PHASE DEPOSITS: A major advantage of
BPTO 2380 is its ability to limit vapor-phase deposits.
With some competitive oils, heavy deposits have
formed where the oil mist and vapors come in contact
with hot engine surfaces resulting in migrating deposits.
LOAD CARRYING: BPTO 2380 provides load carrying
ability, as measured in the Ryder Gear Test well in
excess of requirements established by the engine and
equipment manufacturers. Long life of bearings, gears,
and other highly loaded lubricated surfaces is thus
assured under normal operating conditions.
C L E A N L I N E S S : Minimum formation of varnish or
sludge deposits is one of the characteristic advantages
of BPTO 2380. Long periods of operation are possible
without the danger of scavenge pump screen plugging
or the corrosion that often accompanies excessive
d e p o s i t s .
BULK STABILITY (resistance to physical or chemical
change resulting from oxidation): The high
degree of oxidation resistance of BPTO 2380 permits
long periods of operation without significant increase in
viscosity or total acidity, the two principal indicators of
product oxidation. The need to change oil because of
oxidation effects is rare when using BPTO 2380. Most
users find it unnecessary to make oil changes in spite of
occasional mechanical abnormalities that create
unusually severe oxidizing conditions.
C O M P A T I B I L I T Y :While considerable laboratory data is
available to demonstrate the compatability of BPTO
2380 with metals, elastomers and other lubricants, the
extensive airline experience most adequately demonstrates
this property. Details are given in the section on
“Product Performance.”
SEAL WEAR: Proper functioning of carbon seals is
essential for the life of the engines that use this type of
bearing compartment sealing arrangement. Poor seal
performance may be caused by lubricant properties that
promote (or fail to prevent) wear of the carbon at the
carbon-to-steel face. BPTO 2380 has provided the
dependable performance in numerous airlines that was
predicted by extensive laboratory tests.
* BPTO 2380 is approved against DEF STAN 91-101/2 (DERD 2499)
for both OX-27 and OX-28 requirements. OX-27 is for use in military
gas turbines and accessories. OX-28 is for use in marine gas
t u r b i n e s .
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