946 mL – 1 U.S. Quart - BP

P roduct Perf o rm a n c e
AIRLINE SERVICE: The fact that BPTO 2380
represents the majority of the free world requirement
for 5 cSt turbo oils speaks highly of its performance.
Over 350 airlines are now accumulating approximately
50 million engine hours a year on this lubricant.
Outstanding bulk stability, excellent cleanliness, as
evidenced by low deposit levels in vapor phase areas,
and very good anti-corrosion qualities have made BPTO
2380 the leader in gas turbine lubrication.
OIL CONSUMPTION: Typical consumption with BPTO
2380 ranges from a low of 0.07 litres (0.06 quarts) per
engine hour to a high of 0.59 (0.62).
Evaporation loss—though a factor—is a minor one.
Based upon laboratory tests, BPTO 2380 has a
directional advantage in this respect.
Evaporation Loss,
% at 6 1 ⁄2 hours BPTO 2380 Oil A
at 400°F, Sea Level 3 . 85 4.58
at 400°F, 40,000 ft. 8 . 80 10.09
at 450°F, Sea Level 11 . 81 15.62
at 450°F, 40,000 ft. 21 . 50 27 . 82
In actual practice, the data suggest that engines cannot
distinguish differences in consumption among various
Type II oils. Experience in monitoring oil consumption
over long periods indicates that:
a. Oil consumption is governed more by mechanical
factors than by differences between oils of similar
type.
b. The principal factor related to lubricant chemistry that
affects oil consumption is volatility or loss by
evaporation and this effect is minor.
c. Large differences in consumption among airlines
operating identical equipment in similar route structures
with the same oil are generally attributed to
differences in methods of data collection and record
k e e p i n g .
C O M P A T I B I L I T Y
BPTO 2380 is compatible with other turbo oils meeting
the same specifications to the extent that an
inadvertent mixing or emergency top-off with another
approved brand will not cause additive separation to
occur. However, most engine builders do not
recommend indiscriminate mixing of approved oils
and we agree with this principle.
BPTO 2380 performance is outstanding in the critical
area of compatibility with elastomers such as those
used in O-ring seals. Excessive swelling or shrinking of
seals can cause severe oil leakage. In new engines or in
high-time engines where BPTO 2380 has replaced
another lubricant, there has been no known incident of
oil leakage due to oil-elastomer incompatibility.
Deposit washing is a problem with some turbo oils. This
is the situation where engine deposits, laid down by a
previous oil, can sometimes be loosened or washed off
by changing to a different oil. The loosened deposits
can plug filter screens, which seriously reduces oil flow.
This is more apt to occur when changing over high-time
engines where deposits have had a chance to dry out
during short-term storage or deactivation for service or
repair. Laboratory tests and many years of service have
shown that changing engines to BPTO 2380 should
cause no concern about deposit loosening and
migration, under normal circumstances.
SHELF LIFE
The shelf life of BPTO 2380 can extend beyond four
years when stored in original, unopened quart cans
under acceptable conditions, such as away from
extreme heat and moisture. Likewise, drummed
product (includes 55 gallon drum and 5 gallon pails) has
an expected shelf life of three years minimum. For all
package styles, shelf life can be increased significantly
beyond those stated above, depending upon storage
conditions. Please contact your bp representative if you
have any questions about product usability.
3