The volume of oil required for a cylinder (cylinder oil capacity) is equal to the effective area of the cylinder times the stroke***
* **these are theoretical examples and do not take into account thecompressibility of oil under high pressure

### Cylinder Oil Capacity** = Cylinder Effective Area x Cylinder Stroke**

**Example 1:**

An **RC158** cylinder has an effective area of 20.3 cm2 and a stroke of 200 mm.
How much oil will be required?
**Oil Capacity **= 20.3 cm2 x 20 cm = 406 cm3

**Example 2:**

An **RC5013** cylinder has an effective area of 71,2 cm2 and a stroke of 320 mm.
How much oil will be required?
**Oil Capacity **= 71.2 cm2 x 32 cm = 2,278.4 cm3

**Example 3:**

An **RC10010** cylinder has an effective area of 133.3 cm2 and a stroke of 260 mm.
How much oil will be required?
**Oil Capacity **= 133.3 cm2 x 26 cm = 3,466 cm3

**Example 4:**

Four **RC308** cylinders are being used together, each with an effective area of 42.1 cm2 and a stroke of 209 mm.
How much oil will be required?
**Oil Capacity **= (4 x 42.1 cm2) x 20.9 cm = 3,520 cm3
(Remember, since four cylinders are used together, the area for one cylinder must be multiplied by the number of cylinders used).