Beechcraft Baron G58 Pilot Operating Handbook page 363

Model G58
Do not exceed 25 hours of operation or 6
months, whichever occurs first, with factory
break-in oil (MIL-C-6529, Type II, Multivis-
cosity,
When changing to MIL-L-22851 Ashless
Dispersant oil, change the oil and filter
using the procedures outlined in Section 8,
HANDLING, SERVICING and MAINTE-
NANCE.
Failure to remove the corrosion-preventa-
tive oil and replace the oil filter within the
time interval specified may cause varnish
deposits to form on the pistons and cylinder
walls and deteriorate the filter element.
Drain and replace the engine oil as recommended in Section 8,
HANDLING, SERVICING and MAINTENANCE. If operating
conditions are unusually dusty and dirty, more frequent oil
changes may be necessary. Oil changes are more critical dur-
ing break-in period than at any other time.
Use full throttle for every takeoff and maintain until at least 400
feet AGL, then reduce power as necessary for cruise climb.
Maintain the highest power recommended for cruise operation
during the break-in period (50 to 75 hrs) and interrupt cruise
power every 30 minutes or so by smoothly advancing to take-
off power settings for about 30 seconds.
Avoid long power-off descents and altitudes above 8,000 feet
during the break-in period. Maintain sufficient power during
descent to permit cylinder head temperatures to remain in the
green arc.
Minimize ground operation time, especially during warm
weather. During the break-in period, avoid idling in excess of
15 minutes, especially in high ambient temperatures.
May, 2015
20W-50 Corrosion-preventative).
Section 7
Systems Description
7-63