Is the difference between engine oil 40 and 30 the higher the value, the better the oil?

Even hundreds of thousands of old Japanese cars can only use 30 viscosity oil at most, and 40 engine oil is still too sticky for Japanese engines. The power of the Japanese car itself will be slightly inferior, and the personal Sylphy used to use the extreme protection power is also average, and now it is more obvious to change to GT engine oil to improve. And you used the original engine oil before the power will definitely be very poor, the original mineral engine oil basically ran two or three thousand kilometers of power began to decay, if you want to increase the power more directly on the PAO engine oil, compared with the ordinary fully synthetic engine oil power will be better.

The difference between 5w30 and 5w40 oil is the viscosity of the oil, the viscosity of 5w40 oil is higher than that of 5w30, and the oil of 5w40 is suitable for cars with more than 100,000 kilometers, or for turbocharged cars, it does not give the car a boost in power, you can consider whether it is due to carbon deposition caused by the decrease in power.

American cars can be used for 30 years, unless you have a total of more than 150,000 kilometers of car, you can use 40. I Chevrolet out of the German GT 0W30 engine oil, before the car ran to 2,000 kilometers when the power has dropped badly, when I drive to change, the power is basically not good. After changing the GT, the power is sensitive and strong, the throttle response is also fast, and the power slowly decays after running to 10,000 kilometers, and then changes to 15,000 kilometers.

The higher the number, the higher the high temperature resistance.

New cars can consider using 30 viscosity oil, and the viscosity of the oil should be appropriately increased after the vehicle kilometers are more and the vehicle is older.

Burning engine oil is usually caused by too large a gap between the piston ring and the cylinder wall, and many cars with long mileage may burn oil.

Some car engine oil burns due to oil-air separator failure.

If you don't change the oil for a long time, burning oil may appear in the engine.

If the oil is not changed for a long time, the sealing performance of some rubber seals in the engine will be reduced, resulting in oil consumption.

When you usually use the car, you must change the oil regularly.

Engine oil is known as the blood of the engine, and if there is no oil in the engine, the engine will not function properly.

In practical use, 30 has a lower viscosity and better fluidity, while 40 oil has a higher viscosity and relatively poor fluidity. Therefore, in the case of low temperature in winter, we should use 40 gauge engine oil with good flow, which is easier to start the car.

In summer, it is best to use grade 40 engine oil, the higher the value, the greater the viscosity, and the higher the maximum temperature suitable. The specific classification of automobile engine oil is 6 types of oil for winter, 4 types of oil for summer, and 16 kinds of ordinary oil for winter and summer. The summer oil grade is , the higher the number, the higher the viscosity and the higher the applicable maximum temperature.

The oil is 30 or 40, mainly in combination with the specific brand and model of your car, generally speaking, the car can be selected with reference to the requirements of the maintenance manual.

How to choose the right oil 5W-30 and 5W-40?

The oil power of 40 is better than that of 30. The difference between 40 and 30 is that the viscosity of the engine oil is different, Buick American cars should use 30 engine oil, if the car has run more than 100,000 kilometers, it can be changed to 40 engine oil, so that the car power is better can use higher quality engine oil, I am now using German GT engine oil containing liquid molybdenum, and the power is much better than the previous engine oil.

Note: In the low temperature start-up of computer oil, add "-35°C" to the number in front of W. Good engine oil can bring carbide, sludge and wear metal particles on engine parts back to the oil tank through circulation, and wash away the dirt generated on the working surface of the parts through the flow of lubricating oil.

When adding engine oil, it should be controlled between the upper and lower scale marks of the oil dipstick. Because too much lubricating oil will enter the combustion chamber from the gap between the cylinder and the piston, and burn to form carbon deposits. These deposits can increase the compression ratio of the engine and increase the tendency to detonation; The red-hot state of carbon deposits in the cylinder is also easy to cause premature ignition, such as falling into the cylinder will aggravate the wear of the cylinder and piston, and will also accelerate the pollution of lubricating oil.

The difference between 30 oil and 40 oil is as follows.

The oil is more viscous than the oil of 30.

The oil is suitable for a maximum temperature higher than the oil of 30.

It flows better than 40, reduces fuel consumption (fuel) more, and dissipates heat faster to the engine.

It has better oil stability than 30 in the state of particularly high engine temperatures.

Extended information: The label after the oil classification indicates its viscosity specifications, for example, in "15W W-40", "W" means Winter (winter), the more ** the number in front of it, the better the low temperature fluidity of the engine oil, the lower the ambient temperature available for use, and the better the protection ability of the engine during cold start, such as 5W represents external low temperature resistance to -30 °C, and 20W low temperature resistance is -15 °C.

The number after w represents the kinematic viscosity of the oil at 100, and the higher the value, the higher the viscosity. 40 represents 100 degrees Celsius, and the kinematic viscosity standard is between to, which is definitely not what some people say can be used below 40.

The oil classification is indicated using a two-letter combination. The series starting with "S" represents gasoline engine oil, and the general specifications are from SA to SN (in alphabetical order, but there is no SI in it), and with each additional letter, the performance of the oil will be better than the previous one, and there will be more additives in the oil to protect the engine.

The lower the letter, the higher the quality grade, and most of the oil grades in international brands are above the SF grade. The series starting with "C" represents diesel engine oils. If the letters "S" and "C" are present at the same time, it means that the oil is a general purpose type of gasoline and diesel.

The lower the number, the smaller the low temperature viscosity, the better the low temperature fluidity, and the lower the applicable minimum temperature. The number after w is an indicator of the high temperature resistance of the engine oil, and the higher the value, the better the protection performance of the engine oil at high temperatures. 5W-30 oil models:

The minimum temperature that 5W adapts to is -30, 30 means that the maximum temperature it adapts to is 30, and if 40 is used, then it can adapt to a wider range of temperatures.

Pretty much to be honest.

Again, it doesn't make much difference if you use it.

To put it bluntly, be professional.

It's a little thinner than 30.

The car feels energetic when it runs.

The premise of fuel economy is to sacrifice viscosity and reduce the protection of the engine. The 40's is a little sticky to use, and I feel that the car is not as strong as before.

The premise of fuel consumption is that the viscosity is high, which can better protect the engine.

But these 2 models.

A brand.

You don't usually feel the difference.

Unless it is a particularly harsh environment.

If you use a thinner.

Let's say the car of 2010 is more powerful.

But it is basically equivalent to the engine without oil lubrication, to be strong to penetrate, but the lack is to sacrifice the engine, so don't be entangled in which model.

Fuel is not strong.

All have their own advantages and disadvantages.

But there is basically not much difference between the two models.

The main difference between 5w30 and 5w40 oils of the same quality class is that 5w-30 has relatively better fluidity and is more capable of reducing fuel consumption and dissipating heat faster and better in the engine. At high temperatures, 5W-40 will have better oil stability.

First of all, if the car is in good condition, the viscosity of the oil must refer to the recommended viscosity in the "Car Maintenance Manual", because the technical requirements of the engine designed by each car manufacturer are different, and the requirements for the viscosity of the oil are also different.

Secondly, the same quality level of engine oil:

The W-30 flows better than the 5W-40, reduces fuel consumption (fuel) more, and dissipates heat from the engine faster.

2. For old cars, the engine noise of 5w-30 oil is slightly louder than that of 5w-40 oil.

3. For engines that strictly require the use of 5W-40, if 5W-30 is used, there may be a situation where the oil consumption is greater than normal (commonly known as: burning oil).

The W-40 has better oil stability than the 5W-30 in the particularly high engine temperatures.

If you have to talk about the difference between 5w-30 and 5w-40.

Honestly, it's pretty much the same.

It doesn't make much difference if you use it.

Because driving doesn't feel it.

To put it bluntly.

It's a little thinner than 5w-30.

The car feels energetic when it runs.

The premise of fuel economy is to sacrifice viscosity and reduce the protection of the engine. 5w-40 is sticky to use.

It doesn't feel like the car is as energetic as it used to be.

The premise of fuel consumption is that the viscosity is high, which can better protect the engine.

But these 2 models.

A brand.

You don't usually feel the difference.

Unless it is a particularly harsh environment.

If you use a thinner.

Let's say the car of 2010 is more powerful.

But it is basically equivalent to the engine without oil lubrication, and it is necessary to have strength and penetration, but the lack is to sacrifice the engine.

So don't worry about which model to use.

Fuel is not strong.

All have their own advantages and disadvantages.

But there is basically not much difference between the two models.

30 at normal water temperature, the viscosity is lower, that is to say, thinner, 40 is more viscous than 30 at high temperatures, the power of 30 may be better, but the engine noise may be louder than before, I hope it can help you.

If the quality of the engine oil is average, the improvement of the label will not be obvious, the original engine oil is only able to use, and there are high requirements for the driving experience can be on the high-end engine oil, such as GT Magic Red, which is a ratio of PAO and esters, with long-term power, 15,000 kilometers should be able to meet you, or Jin Mobil, a big brand is much better than the original.

Although the oil label is different, but his quality may be slightly different, and the cycle is also different, that is, it does not mean that he is bad, but that he is more suitable for this engine model.

The oil grade 30 has a lower viscosity at normal water temperature, that is to say, it is thinner, and the 40 oil has a greater viscosity at high temperatures than the 30 one, and the power of changing 30 may be better, but the engine noise may be greater than before.

Oil 30 and 40 are both oil grades.

1. Oil 30 has better fluidity than oil 40, which can reduce fuel consumption (fuel) and dissipate heat faster for the engine.

2. For cars in old condition, the engine noise of the oil using oil 30 is slightly louder than that of the oil oil of 40.

3. For engines that strictly require the use of engine oil 40, if oil 30 is used, there may be a situation where the oil consumption is greater than normal (commonly known as: burning engine oil).

4. Engine oil 40 has better oil stability than engine oil-30 in the state of particularly high engine temperature.

The main difference is the oil viscosity.

In the oil label, the value in front of W indicates the viscosity of the oil at low temperature, the smaller the value, the lower the viscosity at low temperature, and the better the low temperature starting performance.

The value after w indicates the viscosity of the oil at high temperature, the larger the value, the greater the viscosity at high temperature, and the better the protection performance of the engine at high temperature.

Summary. Hello, I am your exclusive technician, attentive, careful, dedicated to answering your car questions, for you to find the corresponding problem solutions and solutions!

The difference between oil 30 and 40 is definitely big. There is a difference in viscosity, 30 is more diluted, 40 is more viscous.

On your side, I recommend that if you are a naturally aspirated engine, we recommend using a 30 engine, and if you are a turbocharged engine, you will use a 40 engine to be more dynamic. It is recommended that you change the engine oil once every 5000 kilometers to ensure that the engine has good lubrication performance.

I hope my answer helps!

Is there a big difference between oil 30 and 40, and which grade has better oil power?

Hello, don't click to end, I'm textual to give you the full answer, 2-3 minutes.

Hello, I am your exclusive technician, attentive, careful, dedicated to answering your car questions, for you to find the corresponding problem solutions and solutions! The difference between oil 30 and 40 is definitely big. There is a difference in viscosity, 30 is more diluted, 40 is more viscous.

On your side, I recommend that if you are a naturally aspirated engine, we recommend using a 30 engine, and if you are a turbocharged engine, you will use a 40 engine to be more dynamic. It is recommended that you change the engine oil once every 5000 kilometers to ensure that the engine has good lubrication performance. I hope my answer helps!

The choice of engine oil needs to distinguish between specific situations: the first thing to look at is what kind of engine the engine belongs to. If the vehicle belongs to the luxury car class, the engine power is sufficient, and the internal parts of the engine are numerous and precise.

At this time, it is more appropriate to choose 5w-30. If it is a scooter of tens of thousands of yuan, the engine power is not high, there are not many parts, and it is most reasonable to choose 5w40 with high viscosity. Using 5w-30 oil will make the engine spin hard.

In addition to judging what oil to use from the engine, you can also choose what oil to use from daily driving habits: if you usually only drive to and from work, and rarely use the car the rest of the time, it is recommended to use 5w-40 oil. Now because of the traffic jam in the city, you may encounter traffic jams when you go to and from work.

At this time, the internal parts of the engine will not run too violently, and the 5w-40 oil is completely sufficient. If you are running at high speeds, it is best to use 5w-30 oil, because the internal parts of the engine will need more fluid oil when running at high speeds, reducing the friction between parts to reduce losses.