Everyone knows that your engine won’t run very well if you don’t use the right oil. Mixing the oil correctly helps to lessen engine friction, which extends the engine’s lifespan.
Therefore, you have to juggle among the various types of oil mixing ratio, 40:1 vs 50:1. Do you know what these two oil mixing ratios mean?
40:1 oil refers to 1 unit of oil, and 40 units consist of gas. Likewise, 50:1 oil has 50 units of gas and 1 unit of oil in every 50 units.
The 40:1 ratio is naturally denser than 50:1, and this higher density of oil helps engines to move their parts more smoothly, making the engine more lubricative. So, the efficiency will be higher in the four-stroke engine.
It’s just the beginning because there’s a lot more to know about. Please bear with us till the end of this article, and this reading will be worth your time.
The numbers 40:1 vs 50:1 refer to the ratio of fuel to oil in two-stroke engine mixtures. The first number represents the amount of fuel, while the second number indicates the quantity of oil. A 40:1 ratio means 40 parts of fuel to 1 part of oil, while a 50:1 ratio implies 50 parts of fuel to 1 part of oil. These ratios determine the oil-to-fuel mixture used in specific two-stroke engines, affecting engine performance, lubrication, and combustion
- Comparison Table Between 40:1 vs 50:1 oil
- How To Mix 40:1 or 50:1 Oil Ratio?
- Can I Use 40 to 1 Instead Of 50 to 1?
- How Much 2 Cycle Oil to Make 40 to 1?
- How Many Ounces of Oil for 40 to 1?
- How Much Oil Per Gallon for 40 to 1?
- Are All Stihl Primer Bulbs the Same?
- Husqvarna 350BT Fuel Mix Ratio
- Mcculloch 2 Stroke Mix Ratio
- Related Questions
- Parting Words
Comparison Table Between 40:1 vs 50:1 oil
To keep the engine well, you need to understand the proper mixing ratio of oil and what this mixing consists of, and then you’ll be able to choose the best oil mixer for your engine. There’s a table below to help you instead.
| Factors | 40:1 | 50:1 |
| Engine Suitability | 4 stroke | 2 stroke |
| Oil density | Higher | Lower |
| Lubrication | Higher | Lower |
| Viscosity | Higher | Lower |
| Engine efficiency | Higher | Lower |
| Lubrication speed | Lower | Higher |
| Engine design | Lighter | Heavier |
| Fuel consumption | Fully consumed | Not fully consumed |
See Also: 50:1 VS 25:1.
Differences Between 40-1 to 50-1 Oil Mixer In Retail
From the above table, it’s pretty easy to get things clear up, but if you need to learn more, you need to go through the rest of the article, and then you are wise to choose the correct ratio. So, have patience and keep reading.
Oil Density
Aforementioned we knew slightly about what is meant by the 40:1 and 50:1 oil mix. Keeping that in mind, a 40:1 oil mix is thicker than a 50:1 oil mix, as density affects lubricant and machine performance.
Most systems are intended to pump a given fluid density; thus, when the density changes, the pump’s efficiency fluctuates based on the oil density.
40:1 oil mix indicates that you have to add 25 ml of oil to every gasoline liter. To make new, standard unleaded gasoline (with no more than 10% ethanol), follow this proportion. Contrastingly, the 50:1 oil mix needs 20 ml of oil for 1 liter. This is why the 40:1 oil mix is denser than 50:1 oil.
Lubrication
Better lubrication depends on the types of engines and the proper oil mixer. From the table, we already knew that the 50:1 oil is needed for two-stroke engines, and for a four-stroke engine, a 40:1 oil mix is needed.
In the case of a two-stroke engine, there is no dedicated lubricant source, and wear is significantly damaged to this engine. It creates more torque at higher revolutions per minute (RPM) which creates more pressure on the piston.
This engine needs faster lubrication, and 50:1 oil is perfect for them. 40:1 oil is quite the opposite as a four-stroke engine creates higher torque at a lower RPM, and the pressure on the piston is decreased.
So, 50:1 oil is better in a two-stroke engine, and 40:1 oil works well in a four-stroke engine.
Viscosity
Many moving elements in an engine cause friction by bumping against one another. That’s why engine performance degrades, parts wear out, creating a barrier between engine moving parts and friction.
It reduces friction between engine parts by forming a coating over them. Motor oil is challenging to pour at lower temperatures due to its high viscosity at room temperature.
When the machine needs to work harder due to the lubricant’s high viscosity, it generates more heat and uses more power. Simultaneously, oils with a low viscosity offer enough protection against friction.
The working conditions of the machine are typically used to determine the optimal thickness of the lubricant.
So, the viscosity of 40:1 oil needs more lubrication, and it’s suitable for a four-stroke engine. Conversely, 50:1 oil is ideal for a two-stroke engine as it has less viscosity.
See Also: 303 Hydraulic Oil Vs AW 32.
How To Mix 40:1 or 50:1 Oil Ratio?
Isn’t it better to know the process of mixing the oil ratio? Sure, and for this, we include a short table to let you know the exact oil mixing ratio.
40:1 and 50:1 Ratio Formula (Imperial Method)
By keeping in mind two imperial values, you can calculate the oil mixing ratio.
- For a 40:1 ratio, you’ll need 1 liter of gasoline for 25 ml of oil.
- For a 50:1 ratio, you’ll need 1 liter of gasoline for 20 ml of oil.
Here we showed a tiny chart in imperial units that helps you to understand the formula.
| Gasoline | 40:1 Ratio | 50:1 Ratio |
| 1 liter | 25 ml | 20 ml |
| 2 liter | 50 ml | 40 ml |
| 3 liter | 75 ml | 60 ml |
| 4 liter | 100 ml | 80 ml |
After getting the chart, hopefully, it’s now most straightforward to mix the oil as per your need. However, you can use this premixcalculator.com to get the ratio.
If you don’t want to face these hassles of mixing, or are a little bit lazy, purchasing blended oil will be the savior for you. Let’s have a look at the two best 40:1 and 50:1 ready to use oil.
TruFuel 2-Cycle 40:1 Pre-Blended Fuel
You can choose this TruFuel 40:1 premixing oil for your small outdoor power tools and equipment, as it is specially formulated by keeping in mind those engines. It contains 92+ octane, pure synthetic oil, and free from ethanol.
- Eradicate the hassle of mixing oil
- Easy to fill your engine’s gas tank without a funnel
- Flawless lubrication and protect your engine
- Need minimal engine maintenance
VP Racing Fuel for Small Engine
This VP Small Engine Fuels oil is engineered with 94 octane for your higher grade engines that requires lower viscosity grade oil.
However, this oil is completely ethanol-free, as ethanol damages your fuel pump. The oil’s right sheerness and thickness will provide maximum protection against heat.
- Ensure your engine’s smooth running
- Offer better throttle response under high pressure
- Increase the engine performance and durability
- Come with easy to pour can to avoid making a gigantic mess
Which oil mixer is eco-friendly?
Till now, we learned a lot of things about oil mixing factors for the 40:1 and 50:1 oil ratios. But currently, pollution is increasing daily, and the world faces many illnesses due to pollution. So the oil which isn’t mixing in the proper ratio can cause air pollution. And this pollution harms people as they breathe polluted air and causes respiratory illness.
A two-stroke engine burns more oil and emits smoke containing carbon monoxide and other harmful particles. However, a four-stroke engine does not produce these emissions. Therefore, the correct oil mixing ratio is crucial, whether it’s 40-1 versus 50-1 for a weed eater.
See Also: Bora VS Kreg Saw Guide.
Can I Use 40 to 1 Instead Of 50 to 1?
Yes, you can use a 40 to 1 ratio instead of a 50 to 1 ratio, but it’s essential to ensure it aligns with the manufacturer’s recommendations for the specific equipment or machinery you’re using to prevent potential damage or performance issues.
How Much 2 Cycle Oil to Make 40 to 1?
To mix a 40:1 ratio of 2-cycle oil to gasoline, you’ll need to combine 3.2 fluid ounces of 2-cycle oil with 1 gallon (128 fluid ounces) of gasoline.
This ratio ensures that for every 40 parts of gasoline, there is 1 part of 2-cycle oil.
How Many Ounces of Oil for 40 to 1?
A fuel mixture of 40:1 typically requires 3.2 fluid ounces of oil per gallon of gasoline. This ratio means that for every 40 parts of gasoline, you’d add 1 part of oil. For smaller quantities, you can adjust accordingly. For example, for 2.5 gallons of gasoline at a 40:1 ratio, you would need 8 fluid ounces of oil (2.5 gallons x 128 ounces per gallon = 320 ounces total; 320 ounces / 40 = 8 ounces of oil).
How Much Oil Per Gallon for 40 to 1?
When mixing oil and gasoline at a ratio of 40 to 1, it means there are 40 parts of gasoline to 1 part of oil. To calculate the amount of oil needed for 1 gallon of gasoline at a 40 to 1 ratio, you divide the total volume of gasoline (1 gallon) by the sum of the parts in the ratio (40 + 1 = 41 parts).
So, the calculation is: 1 gallon ÷ 41 = approximately 0.0244 gallons of oil.
Therefore, for a 40 to 1 ratio, you’ll need approximately 0.0244 gallons (or approximately 3.9 ounces) of oil per 1 gallon of gasoline.
Are All Stihl Primer Bulbs the Same?
No, not all Stihl primer bulbs are the same. Stihl produces various types and sizes of primer bulbs for different models of their equipment.
The design, size, and specifications of the primer bulbs may vary depending on the particular Stihl tool or machine they are intended for. It’s important to check the model number and specifications of your Stihl equipment to ensure compatibility when purchasing replacement parts like primer bulbs.
Husqvarna 350BT Fuel Mix Ratio
The Husqvarna 350BT operates on a fuel mixture of gasoline and two-stroke engine oil. The recommended fuel mix ratio for the Husqvarna 350BT is typically 50:1, which means 50 parts gasoline to 1 part two-stroke engine oil.
This ratio ensures proper lubrication and performance for the engine. Always use a high-quality two-stroke engine oil designed for air-cooled engines when mixing fuel for your Husqvarna 350BT.
Mcculloch 2 Stroke Mix Ratio
The McCulloch 2-stroke engine typically requires a fuel-to-oil mixture ratio of 50:1. This means mixing 50 parts of unleaded gasoline with 1 part of 2-stroke engine oil.
For instance, for every gallon (128 ounces) of gasoline, you would add 2.56 ounces (or 1/2 a cup) of 2-stroke engine oil.
Always refer to the specific manual or manufacturer’s recommendations for the exact ratio for your particular model, as it may vary.
Related Questions
Does a four-stroke engine need pre-mixing oil and fuel?
No, a four-stroke engine doesn't need pre-mixing oil and fuel. Because it has four compartments for oil, and if you mix a large amount of mixed oil, it may gum up your engine plug and damage it. So, no need to add pre-mixing oil and fuel to it.
40:1 vs. 50:1 Which oil mixer costs high?
50:1 oil mix costs higher than 40:1 oil. It may cost you 3X- 4X higher than 40:1 oil.
Can I use 50:1 oil in a 40:1 oil engine?
No, you can't use 50:1 oil in a 40:1 oil engine, because it may damage the engine and produce more smoke.
Can I use 40:1 instead of 25:1?
No, it's not a good idea to use 40:1 instead of 25:1, as 40:1 is thicker than 25:1.
Is it OK to use 50:1 instead of 40:1?
It's generally not advisable to use a different oil-to-fuel ratio than what's recommended by the manufacturer. Using a 50:1 ratio instead of 40:1 might not provide sufficient lubrication, potentially causing engine damage.
Does 40:1 have more oil than 50:1?
Yes, a 40:1 ratio has more oil compared to a 50:1 ratio. For every gallon of gasoline, a 40:1 ratio requires more oil (1 gallon of oil for 40 gallons of gasoline) than a 50:1 ratio (1 gallon of oil for 50 gallons of gasoline).
Can I run 40:1 in a 50:1 trimmer?
It's not recommended to use a different oil-to-fuel ratio than what's specified for your trimmer. Running a 40:1 mixture in a trimmer designed for 50:1 might affect engine performance and potentially cause damage.
Is 40:1 a good ratio?
A 40:1 ratio can be suitable for certain two-stroke engines if recommended by the manufacturer. However, always follow the manufacturer's guidelines regarding the appropriate oil-to-fuel ratio for your specific equipment to ensure optimal performance and prevent damage.
Parting Words
This is all about 40:1 vs. 50:1 fuel oil mixer. Hopefully, you now know how to choose your required oil mixer and keep your engine safe.
It is wise to see your engine’s manual and mix oil likewise. Thus it will save the engine as well as decrease pollution.
Go, mix up the gasoline and enjoy your journey. Please, do not forget to share your enjoyable experience with us. Keep reading and have an incredible journey with your transports.
Please let us know in the comment section below if you have any other queries.
Godspeed!
