Cessna Skyhawk 172N Pilot Operating Handbook page 205

Supplement POH
Reims/Cessna (F) 172 N&P
with TAE 125-02-114
At the fuel selector valve:
Left and Right position: 63.7 Ltr/ 16.8 gal
Both position: 127.4 Ltr/ 33.6 gal
Left and Right position: 79.3 Ltr/ 20.9 gal
Both position: 158.6 Ltr/ 41.9 gal
Normal category aircraft with integral fuel tanks:
Left and Right position: 98.4 Ltr/ 26 gal
Both position: 196.8 Ltr/ 52 gal
Utility category aircraft with integral fuel tanks:
Left and Right position: 79.3 Ltr/ 20.9 gal
Both position: 158.6 Ltr/ 41.9 gal
On the oil funnel or at the flap of the engine cowling:
If installed, at the flap of the engine cowling to the External
Power Receptacle:
"ATTENTION 12 V DC OBSERVE CORRECT POLARITY"
"ATTENTION 24 V DC OBSERVE CORRECT POLARITY"
All further placards contained in this section remain valid.
With standard tanks:
With long-range tanks:
"Oil, see POH supplement"
OR
Page 2-11
Issue 2
Revision 7, Jan. 2018