Aircraft Type: CTSW
FLIGHT DESIGN
Aircraft Operating Instructions
Page: 3-3
AU 010 01000
Rev. No: 7
Original Issue Date: 28-Feb-2005
Revision Date: 29-Apr-2008
3.4 Oil
Only brand-name semi-synthetic or full synthetic 4-stroke motorcycle oil should be used.
ROTAX 912 UL2 ROTAX 912 ULS
Oil, normal operating pressure (below 3.500 RPM) 2.0 – 5.0 bar
29 – 73 psi
Oil, min operating pressure (above 3.500 RPM) 0.8 bar
12 psi
on very cold start momentarily 7 bar allowed
Min/max temperature measured at the oil inlet of
the engine
50 / 130 ºC
120 / 266 ºF
Optimum operating temperature 90-110 ºC
190-230 ºF
Oil capacity 3.0 l, min 2.0 l
6.4 liq pt, min 4.2 liq pt
Max oil consumption, L per hour / liq pt per hour 0.06 / 0.13
The engine is equipped with a friction clutch to guard against sudden propeller stoppage:
for this reason, oils with friction modifiers or additives that favor clutch slippage should not
be used.
Diesel engine oils are unsuitable because of their lower temperature tolerances.
For oil change intervals see the Maintenance and Inspection Procedures Manual.
Note: If the engine is primarily run on AVGAS, more frequent oil changes will be required
because of possible lead build-up.
For complete oil specifications see the Rotax 912 Operator’s Manual
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