Stihl Fuel Mix Calculator
Quick Answer
All Stihl equipment manufactured after 2002 uses a 50:1 fuel mix ratio (2.6 fl oz of Stihl HP oil per gallon of gas). Pre-2002 models may use 40:1.
Stihl Calculator
Custom Ratio:
:1
Oil Needed
You Need
2.6
fl oz
for 1 gallon at 50:1 ratio
Milliliters
77
US Fluid Ounces
2.6
Liters
0.077
Stihl Equipment Types
- Chainsaws (MS 170, MS 250, MS 261, MS 362, MS 500i, etc.)
- String Trimmers (FS 38, FS 55, FS 91, FS 131, FS 250, etc.)
- Leaf Blowers (BG 50, BG 86, BR 200, BR 430, BR 700, etc.)
- Hedge Trimmers (HS 45, HS 82, etc.)
- Cut-off Saws (TS 420, TS 500i, etc.)
Recommended Oil for Stihl
Stihl HP Ultra 2-Cycle Engine Oil (synthetic) or Stihl HP Super (semi-synthetic). Both meet JASO FD and ISO-L-EGD standards.
Always Check Your Owner's Manual
Using the wrong fuel ratio can damage your engine. Pre-2002 Stihl models may require 40:1 ratio. Check the label on your equipment or your owner's manual.