Oil Consumption; Oil Type And Viscosity; Add Oil To The Engine - Lycoming TEO-540-C1A Maintenance Manual

3. Oil Consumption

NOTICE: To ensure accurate calculation of oil consumption, each time oil is added to the engine,
record the amount of oil added in the engine logbook.
A. Use the following formula to calculate the maximum allowable oil consumption limits for
this engine and record the value in the engine logbook. Compare this oil consumption value
to past oil consumption values.
WARNING ONCE BREAK-IN IS COMPLETE, IF OIL CONSUMPTION IS MORE
B. If engine oil servicing is consistently frequent or oil consumption has increased or is
excessive:
(1) Complete the "Cylinder Borescope Inspection" procedure in Chapter 72-30.
(2) Refer to Chapter 12-30 for corrective action to identify and correct the cause of the
excessive oil consumption before further flight.

4. Oil Type and Viscosity

A. The correct oils to be used in the TEO-540-C1A engine are identified in Appendix A of the
TEO-540-C1A Engine Installation and Operation Manual.
WARNING DO NOT USE AUTOMOTIVE OIL IN LYCOMING ENGINES BECAUSE
B. Refer to the latest revision of Service Instruction No. SI-1014 for additional details.
C. The only type of oil approved for turbocharged engines is ashless dispersant oil because it
can withstand wide variations of ambient temperature. The ashless dispersant oil grades
contain additives which have a viscosity stabilizing effect. The additives in these oils extend
operating temperature range, improve cold engine starting and lubrication of the engine
during the critical warm-up period, thus permitting flight through wider ranges of climate
changes without a need to change oil type. However, these oils will not prevent all of the
problems encountered in extremely cold environments (below +10°F (-12°C)). At these
temperatures, preheating of the engine and oil supply tank will be necessary regardless of the
type of oil used. Refer to the "Engine Conditions" chapter in the TEO-540-C1A Engine
Installation and Operation Manual to apply heat to a cold engine.

5. Add Oil to the Engine

NOTICE: Each time oil is added to the engine, record the quantity of oil added in the engine
logbook to calculate oil consumption.
A. Oil Additives
If used, the anti-scuffing agent oil additive (P/N LW-16702), to decrease engine wear, is to be
added to the oil sump during an oil change. Refer to the latest revision of Service Instruction No.
SI-1409 for the general use of LW-16702. If the engine oil already contains an anti-scuffing
agent equivalent to LW-16702, do not add additional LW-16702.
NOTICE: The approved oil, oil sump capacity, and the minimum quantity for engine operation
are identified in Appendix A of the TEO-540-C1A Engine Installation and
Operation Manual.
12-10
Page 66
0.006 x BHP x 4 ÷ 7.4 = Qt./Hr.
THAN THE CONSUMPTION RATES IN APPENDIX A OF THE TEO-
540-C1A ENGINE INSTALLATION AND OPERATION MANUAL, THE
AIRCRAFT IS NOT TO BE IN FLIGHT. EXCESSIVE OIL
CONSUMPTION IS AN INDICATION OF A PROBLEM, SUCH AS OIL
LEAKS OR CYLINDER MALFUNCTION.
THEY COULD CAUSE ENGINE DAMAGE.
TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
© 2018 Avco Corporation. All Rights Reserved
November 2018