Maintenance Manual STEMME S10-VT
Date of Issue: Jan. 01, 1998
Page 3-30
Amendment Nr. 0
Date: --
A4011121_B23.doc
Doc. No. A40-11-121
3.4.14.3 Lubricants
Engine with integrated reduction gear
Use automobile engine oils of registered brand, with gear additives. These oils contain detergents. Do not
use aircraft motor oil, neither with nor without additives.
Oil quantity:
0.8 US gal / 0.66 Imp gal / 3 l (minimum 0.53 US gal / 0.44 Imp gal / 2 l)
Oil consumption:
max. 0.026 US gal/h / 0.022 Imp gal/h / 0.1 l/h
NOTE:
Oil specification: Only use "SF" or "SG" oils according to the API-system with reduction gear additives
"GL4" or "GL5"!
CAUTION:
The reduction gear additives, specified "GL4" or "GL5", are required for a safe lubrication of the
integrated reduction gear. Never use other oil additives!
NOTE:
Full- or semi-synthetic oils are to be preferred because of the temperature stability and less residue
formation.
CAUTION:
A full synthetic oil in combination with AVGAS results in abnormally high abrasion and/or
residues. During utilisation of AVGAS, only semi-synthetic oils should be used.
a) Viscosity:
It is recommended to use multi-grade oils. Viscosity of
multi-grade oils is less depending on temperature
compared to single-grade oils. Multi-grade oils can be
used all over the year. After an engine start at low
temperatures the engine components are lubricated faster
and at higher temperatures the oil is less light.
Temperatures of next SAE-classes overlap, so for short-
term temperature variations there is no need to change oil.
The suitable oil grade can be chosen from the table.
Front gear
Use reduction gear oils specified according to MIL-L-2105C (Grade 90), e.g. automotive gear oils HYP 80W,
HYP 85W-90, HYP 85W-140 according to API-GL5, or Shell Aviation Oil S 8350 according to DTD 900/4981.
Engine Oil Table
