2-stroke oils

Mastering Your Two-Stroke Mix – A Guide to the Right Oil Amount

Mixing fuel for a two-stroke engine is about more than just numbers; It's a direct investment in the health of your machine. The right amount of oil creates the protective film needed for the engine to withstand high revs and extreme heat without cutting.

Default measure: 2% (1:50)

For the vast majority of modern air-cooled engines, a 2 percent blend is the golden ratio. In practice, this means that you add 0.1 liter (1 dl) of oil to every 5 liters of gasoline. This balance provides optimal lubrication without causing unnecessary smoke generation or soot clogging.

When is a fattier mixture required?

Some situations require extra margins. If you're working with an older machine from the last century, or if you're bringing in a brand-new engine, a stronger blend of 3% or 4% is often recommended.

• 3% (1:33): Provides extra protection under heavy loads.
• 4% (1:25): Common for vintage machines with older bearing designs.

Pro tips for a successful mix

• The order matters: Always start by pouring the oil into a clean can and then fill it up with petrol. This causes the liquids to swirl together and mix homogeneously immediately.
• Shake before starting: Even if the oil is loose in the petrol, you should always give the can a quick shake if it has been stationary for a while. Oil and gasoline can layer up somewhat over time.
• The freshness principle: Avoid mixing more than you consume within a month. Old gasoline loses its ignition, and the oil's lubricating properties can deteriorate when exposed to oxygen and temperature fluctuations in a half-empty canister.

By being careful with your measurements, you ensure that your equipment starts up easier, runs cooler and lasts significantly longer.

Mixing Table

Use the table below to quickly find the right amount of oil based on how much gasoline you're going to mix. The most common ratio for modern machines is 2%.

Fuel mixture – how to mix petrol and oil

For two-stroke engines, the right mixture ratio of gasoline and oil is crucial for performance and longevity.

At 2% oil mixture (1:50):

• 1 liter of gasoline: 0.2 dl oil (20 ml)
• 5 liters of gasoline: 1.0 dl oil (100 ml)
• 10 liters of gasoline: 2.0 dl oil (200 ml)

At 3% oil mixture (1:33):

• 1 liter of gasoline: 0.3 dl oil (30 ml)
• 5 liters of gasoline: 1.5 dl oil (150 ml)
• 10 liters of gasoline: 3.0 dl oil (300 ml)

At 4% oil mixture (1:25):

• 1 liter of gasoline: 0.4 dl oil (40 ml)
• 5 liters of gasoline: 2.0 dl oil (200 ml)
• 10 liters of gasoline: 4.0 dl oil (400 ml)

Keep in mind:

• Always follow the recommendations of the machine or engine manufacturer
• Too little oil can damage the engine, too much can impair function