BR 380
English
10
Using multiple tankfuls of leaded 
gasoline can substantially reduce the 
effectiveness of the catalytic converter.
Gasoline with an alcohol component 
exceeding 10% can cause impaired 
engine performance in engines with 
manually adjustable carburetors and 
thus should not be used in these 
engines.
Engines with M-Tronic deliver full engine 
performance using gasoline with an 
alcohol component of up to 25% (E25).
Engine oil
Use only high-quality two-stroke engine 
oil – preferably STIHL two-stroke engine 
oil, as this is specially engineered for 
STIHL engines and guarantees long 
engine life.
If STIHL two-stroke engine oil is 
unavailable, use only two-stroke engine 
oil for air-cooled engines – do not use 
engine oil for water-cooled engines or 
engines with a separate oil circuit (e.g., 
conventional four-stroke engines).
Only STIHL two-cycle engine oil 1:50 
may be used to produce the fuel mixture 
for machines with a catalytic converter.
Mixing ratio
with STIHL two-cycle engine oil 1:50; 
1:50 = 1 part oil + 50 parts gasoline
Examples
N Pour oil into an approved safety fuel 
canister first, then add gasoline and 
mix thoroughly
Storing fuel mixture
Store in approved safety fuel canisters 
only in a dry, cool and secure place 
protected against light and sunlight.
Fuel mixture ages – mix only as much as 
needed for a few weeks. Do not store 
fuel mixture for longer than 
three months. The fuel mixture can 
become unusable faster if exposed to 
light, sunlight or low or high 
temperatures.
N Shake the canister containing the 
fuel mixture thoroughly before 
refueling
Pressure can build up inside the canister 
– open carefully.
N The fuel tank and the canister in 
which fuel mixture is stored should 
be cleaned thoroughly from time to 
time
Residual fuel and the liquid used for 
cleaning must be disposed of in 
accordance with regulations and without 
harming the environment!
Quantity of 
gasoline
STIHL two-cycle engine 
oil 1:50 
Liters Liters (ml)
10.02(20)
5 0.10 (100)
10 0.20 (200)
15 0.30 (300)
20 0.40 (400)
25 0.50 (500)