Oil Consumption; Oil Type And Viscosity - Lycoming YO-233-B2A Maintenance Manual

(3) Wipe all oil from the rod with a clean, lint-free cloth. Do not let any lint or dirt get in the
oil fill port.
(4) Put the oil level gauge dipstick rod fully back into the oil sump and pull the rod out
again.
(5) Look at the oil level indication on the dipstick rod.
(6) If the oil level is not sufficient add the correct oil through the fill port. Refer to the
section "Add Oil to the Engine" in this chapter.
C. The oil sump capacity and the minimum quantity for flight and on the ground are identified
in Appendix A of the YO-233-B2A Engine Installation and Operation Manual.

3. Oil Consumption

IF OIL CONSUMPTION IS MORE THAN THE CONSUMPTION RATES
SHOWN IN TABLE 1, THE AIRCRAFT IS NOT TO BE IN FLIGHT.
UNUSUAL OIL CONSUMPTION IS INDICATION OF A PROBLEM, SUCH
AS OIL LEAKS OR CYLINDER MALFUNCTION. IDENTIFY AND
CORRECT THE CAUSE(S) OF THE INCREASED OIL CONSUMPTION.
A. The maximum rate of oil consumption in quarts per hour is:
B. Usual oil consumption rates in quarts per hour are shown in Table 1.
C. Unusual oil consumption rates are:
1 quart (0.9 liter) for every 3 hours of operation – start of too much consumption
1/2 quart (0.5 liter) of oil consumed for every hour during usual engine operation
If the engine oil level is less than the minimum oil level or oil consumption has increased or
D.
is unusual, look for oil leaks and examine the engine cylinders. Identify and correct the cause
of the increased oil consumption or overhaul the engine, if necessary, before the next flight.
4. Oils Type and Viscosity
The correct oils to be used in the YO-233-B2A series engines are in Appendix A of the YO-
A.
233-B2A Engine Installation and Operation Manual.
12-10
Page 60
DO NOT FLY THE AIRCRAFT IF THE OIL LEVEL IS LESS THAN THE
MINIMUM OIL LEVEL. IF THE ENGINE IS OPERATED ON A LOW
OIL LEVEL, ENGINE DAMAGE CAN OCCUR.
0.006 X BHP X 4
Oil Consumption
Performance (75% Rated)
Economy
DO NOT USE AUTOMOTIVE LUBRICANTS IN LYCOMING ENGINES
BECAUSE THEY MAY CAUSE ENGINE FAILURE.
YO-233-B2A Engine Maintenance Manual
TEO-540-A1A Engine Maintenance Manual
7.4
Table 1
0.84 Max Qt/Hr
0.67 Max Qt/Hr
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February 2021