Fuel Ratio Calculator
Calculate the correct ratio of petrol to 2-stroke oil for optimal performance and engine protection.
Fuel Amount
Ratio
Oil Required
200
ml
10 litres requires 200ml of oil.
Reverse Calculator
10.0
Litres
Quick Reference Guide
| Fuel | 50:1 | 40:1 |
|---|---|---|
| 5L | 100ml | 125ml |
| 10L | 200ml | 250ml |
| 20L | 400ml | 500ml |
Common Engine Examples
⚓ Outboard Motor
50:1
🪚 Chainsaw
50:1
🌿 Brush Cutter
40:1
🏍️ Older Dirt Bike
32:1
BEST PRACTICE TIPS
Use quality 2-stroke oil for best protection.
Always mix thoroughly before use.
Store mixed fuel correctly and safely.
Check your engine manual for exact ratio.
TOO MUCH OIL
Excess Oil Can Reduce Performance
Over-oiling may protect components, but it can also create excessive smoke, carbon build-up and fouled spark plugs.
- Heavy exhaust smoke
- Carbon deposits inside engine
- Fouled spark plugs
- Reduced fuel efficiency
- Poor throttle response
TOO LITTLE OIL
Insufficient Lubrication Can Damage Engines
Running lean on oil increases friction and heat, which can rapidly damage pistons, bearings and cylinder walls.
- Increased engine wear
- Overheating risk
- Piston seizure
- Bearing damage
- Reduced engine lifespan
Frequently Asked Questions
Only if your engine manufacturer specifically recommends it.
The engine may smoke excessively and foul spark plugs.
Ideally no longer than 30 days.
Generally yes. It burns cleaner and provides better lubrication.
