What will happen to the car if you change the oil from 40 to 30?

What will be the impact of changing the engine oil from 40 to 30 on the car, according to the analysis of different trips and the age of the car, if it is a new car that has been used for one year, the engine has just passed the run-in period.

It is still in the rising period of performance, and it is no problem to change from 40 oil to 30 engine oil, but the premise is that you need to buy the best engine oil of the big brand, and do not buy inferior fake engine oil.

If it is a low-end model of seven or eight years old, it is recommended to continue to use 40 oil, after all, the wear of the engine is not in the rising period, the gap between the piston, piston ring and the cylinder wall increases, and the oil model with higher viscosity is needed to protect it, it is recommended to continue to use 40 oil to achieve the effect of protecting the engine.

As far as I know, there will be a serious impact, and you must change the right oil when you change the oil of your car. When encountering unsuitable oil, it is very likely that a cylinder burst will occur. If 40 is replaced by 30, the car is likely to burn oil, and it is recommended not to change the oil model of your car at will.

Assuming that the oil viscosity of this change is 30 and the manual requirement is 40, expect the wear and tear that will occur during the 5000 km oil change.

It may be close to the degree of wear and tear of 15,000 kilometers with 40 viscosity oil, so the viscosity of the oil should not be too low;

In the same way, it is not recommended to lower the standard if the 40 viscosity oil is required, and the 40 viscosity oil that has been used for a long time should not lower the standard, otherwise there is a possibility of burning the oil.

These numbers are the level of viscosity of the oil, and the higher the number, the higher the viscosity level, the more viscous it will be. Changing the oil from a viscous 40 to a less viscous 30 will reduce the lubrication resistance between the various components of the engine, and the fuel consumption will be reduced from the perspective of fuel consumption.

The oil film can be understood as a soft connection between the piston and the cylinder wall, and the oil film with a suitable thickness can form a soft contact between the piston and the cylinder wall, and the friction between the upper and lower will be hydraulic wear; If the oil film is too thin, the piston and cylinder wall will be degraded from hydraulic wear to solid wear, which will not be exaggerated, but will still cause some damage to these two components over time. Assuming that the viscosity of the oil changed this time is 30 and the manual requirement is 40, it is expected that the wear and tear generated during the oil change of 5000 kilometers may be similar to the wear and tear of 15000 kilometers of 40 viscosity oil, so the viscosity of the oil should not be too low; In the same way, it is not recommended to lower the standard if the 40 viscosity oil is required, and the 40 viscosity oil that has been used for a long time should not lower the standard, otherwise there is a possibility of burning the oil.

If it is a relatively new car, at the beginning of the use of 40 oil, now change to 30, in fact, there is no problem at all, on the contrary, due to the reduction of oil viscosity, the power response will become better, the engine will not have any adverse effects, you can be completely assured.

The noise of the engine will rise, because there is a viscous oil against each part, but now the strength of this top has become smaller, and the noise will inevitably rise. With the wear and aging of the vehicle, there is a gap between the piston ring and the cylinder wall, and the oil with high viscosity will be scraped back to the crankcase by the piston ring, and the small viscosity will be a little unable to hang back, and the oil will be burned.

In this way, I think it does have a certain impact, after all, the car, he originally had one, the right oil, if you change to other types, it may not be so good.

It didn't affect at all I started with 402 bottles for 20,000 kilometers and then 30 for 2 bottles for 20,000 kilometers and 20 for 20 The fuel consumption of the three types is not the same 40 is much higher 30 is the same, the power is not so good, with 20 every day to the city to the city now 100 kilometers Civic 38 liters go 660 kilometers to refuel, the machine is refueled at 38) 39 liters each time.

Do not change the label of the engine oil at will, one is to look at the manufacturer's manual for this car, especially to use the oil of that number, and the other is to understand the meaning of the oil label, do not let some articles on the Internet mislead, do not take it for granted.

If you want to save costs, choose a fully synthetic engine oil to change once every 10,000 kilometers, which is basically equivalent to replacing it once a year for most family cars, and the cost of machine filtration and man-hours will actually be lower.

I used it once, ran 2000 kilometers, the engine valve top tube abnormal noise, changed back to 40, the abnormal sound has always existed, so still use engine oil according to the instructions requirement.

This makes no difference, and the 40 oil is a little thicker. 40 is more suitable for use in summer or high temperature areas.

If it is a high-performance car or a supercar, you should be more cautious when choosing engine oil, and do not easily use low-grade engine oil, so as not to damage the engine and the gains outweigh the losses.

The viscosity of the engine oil can be as low as what standard is fixed, and different engines will go through strict calculations at the beginning of the design to determine the viscosity suitable for the oil, because the viscosity of the oil will play an important role in the thickness of the oil film.

A: There is no impact, just change the oil change maintenance time!

Turbocharger engines must be made with fully synthetic oil!

It is often used for long-distance running with 40, with high viscosity and low wear. 30 for urban running, low viscosity, good fluidity, fuel saving!

As long as you clean the original oil during the replacement process, adding a new one will not make much of a difference.

30 is winter oil and 40 is summer oil, but now some cars require 20 in all seasons

It is not recommended to change the engine oil, and if it is replaced, it is likely to burn the oil.

This increases fuel consumption because the viscosity of the oil increases. I suggest that you do not change the model of the engine oil at will, and it is best to use the label recommended by the original factory. Because the manufacturer has undergone strict testing and experiments, it is the most suitable for the normal operation of your engine, and your higher grade will only have an adverse effect on your engine, which will increase the engine running resistance, and the increase in fuel consumption and temperature outweighs the loss.

1. Strictly follow the instructions.

Many maintenance theories are actually untenable, oil thickening will affect heat dissipation and increase engine running resistance, this is also false, it is best to start from the oil composition to learn it systematically, the oil model is only marked with high temperature and low temperature fluidity, the oil grade is the key, judging the quality of the engine oil layman can only test what letter is the standard, such as SN-CF, which means SN grade, CF means diesel engine can be used. Try to buy engine oil products from regular channels, there are too many fake oils, and you will suffer a big loss if you are greedy for cheap, and you get what you pay for.

Second, it should be decided according to the minimum temperature in winter in the area where the vehicle is located.

3. The viscosity of engine lubricating oil is generally composed of two aspects, that is, low-temperature viscosity and high-temperature viscosity. The analysis is as follows:

5W is suitable for the ambient temperature not less than minus 30 degrees, and 10W is suitable for the ambient temperature not less than minus 25 degrees. As long as the minimum temperature in your local winter is not lower than minus 25 degrees, then you can change to 10w. If your local minimum temperature is below -25 degrees, then you are wrong.

High temperature viscosity, the manufacturer requires the use of No. 30, if it is a new car, the car is in good condition, according to the manufacturer's requirements. If it's an old vehicle, size 40 is fine.

That is, the local minimum temperature is not less than minus 30 degrees, new cars or vehicles are in good condition, continue to use 5w-30, and old and old vehicles can be changed to 5w-40. The local minimum temperature is not less than minus 25 degrees, and new and old vehicles can use 10w, but new cars or vehicles are in good condition, using 10w-30, and old and old vehicles use 10w-40.

It has an impact on the car, the viscosity of the two oils is not the same, the viscosity of the oil of 100,000 40 is greater, and the high viscosity of the oil will increase the resistance of the engine when it runs in the engine, so that the noise of the car is strong, and the fuel consumption will also increase, which will cause certain wear and tear to the engine.

It has a certain impact on the car, because the viscosity of the oil will increase, the fuel consumption will also increase, and it will also affect the output of power, the noise of the car is also larger, the wear and tear of the engine is higher, and the performance of the car becomes worse.

It must have an impact on the car, the vehicle can only be equipped with the corresponding engine oil, if it is changed to other engine oil, the spark plug and engine of the car will be seriously affected.

5w40。For old cars, the wear and tear of the engine's valve mechanism, crank connecting rod mechanism and other components are already more serious, so it is necessary to choose 5w40 engine oil with higher viscosity. Because the viscosity of 5w40 oil is higher than that of 5w30, it can form a thicker oil film on the parts, thereby slowing down the continuous wear and tear of the parts and the noise caused by the increase in the gap between the parts.

What is the impact of changing the oil from 40 to 30 on the car, I would like to change it according to the analysis of different travel and car age, if it is a new car that has been used for one year, the engine has just passed the run-in period, or is in the rising period of performance, it is no problem to change from 40 oil to 30 engine oil, but the premise is that you need to buy the best engine oil of the big brand, do not buy inferior fake engine oil.

If it is a low-end model of seven or eight years old, it is recommended to continue to use 40 oil, after all, the wear of the engine is not in the rising period, the gap between the piston, piston ring and the cylinder wall increases, and the oil model with higher viscosity is needed to protect it, it is recommended to continue to use 40 oil to achieve the effect of protecting the engine.

Summary. Hello dear, it doesn't have a big impact. It's the viscosity, a little lower, the engine sound. There may be a little bigger, something else. No problem, this one won't change significantly.

Hello dear to this, it doesn't have a big impact. It's the viscosity, a little lower, and the sound of the rubber stove is started. It's possible that the beam will be a little bigger, and the other. No problem, this one won't change significantly.

My car is a FAW Besturn X40, changed the oil of 5w30, after the car starts, about 20 minutes of messy grip, the timing of the chain has an abnormal sound, does it have anything to do with the oil?

That is, the car does not sound when it is cold, the speed of the car is about 1500 when it is hot, and it does not sound when it is on 2000 rpm.

This has nothing to do with the oil, unless you change the fake oil, oh, the abnormal noise of the previous 40? How many kilometers is your car?

30,000 kilometers of car, which was not available before.

Try changing the oil again. With 40's, your car. 30,000 km. The seepage bucket should be within the warranty period, right? Is there a source for this, if you have seen it in the store? This is the case. and oil plexus crack grinding. It's not a big deal.

Especially on the uphill section, the sound is particularly obvious, the same as the diesel engine. Just after the warranty period, the maintenance master checked the piston and so on, but he couldn't find the reason.

A big cover with an abnormal noise. This valve is a click, you don't like this. Timing this side. Segment splitting is more like a bit. You can change the oil with a large degree of sticky jujube to see if it will improve, okay.

Uh-huh, have a great day

Causes of burning engine oil and how to prevent it.

The oil itself is consumed to a certain extent, and excessive consumption is the problem of burning engine oil. There are many factors that affect the burning of engine oil, such as: fuel quality, driving conditions, driving habits of touching the front beam, maintenance habits, etc., the following reasons will aggravate the oil consumption and cause the oil to burn, so that the vehicle appears:

1. Carbon deposition occurs in the combustion chamber, which makes the gas ring of the piston ring stuck, and the sealing is poor.

2. Oil sludge is generated in the lubrication system, and the oil sludge blocks the oil return hole of the oil ring and weakens the oil scraping performance.

3. Wear occurs between the piston and the cylinder wall.

4. The valve seal is corroded and aging, and the sealing performance fails.

In addition, cars now have crankcase ventilation systems (exhaust valves), which can also exacerbate oil consumption if there is a problem.

Burning engine oil means that the engine oil enters the combustion chamber of the engine and participates in the combustion along with the mixture. The phenomenon of "burning engine oil" in the vehicle will damage the vehicle's oxygen sensor too quickly, resulting in an increase in carbon deposition in the combustion chamber, unstable idling, weak acceleration, increased fuel consumption, and excessive exhaust emissions.

Precautionary measures for burning engine oil:

1. Use high-quality engine oil

Engine oil is very easy to corrode and age in a long-term high temperature state, resulting in the oil film becoming thinner, and it is easier to escape to the combustion chamber to participate in combustion, so the use of high-quality engine oil can greatly delay this phenomenon.

2. Pay attention to the cleanliness of the fuel circuit

Fuel in the combustion process is indispensable to produce carbon deposits, and carbon deposits are the root cause of some car failures, such as the aging of valve seals, piston cylinder wall clearance, etc., all have a direct or indirect relationship with the formation of carbon deposits, considering the relationship between domestic oil products, it is necessary to use high-quality engine oil and (PNF) fuel additives to achieve, which is also the key to achieving no dismantling and repairing to solve the problem of burning engine oil.

The relationship between burning engine oil and engine oil brand

The designation on the back of the SAE indicates the viscosity value of the oil. For example: SAE5W-30, where "W" represents Winter, and the number in front of "W" represents the flow viscosity at low temperatures. The number after the "w" is the viscosity of the oil at 100, the higher the number, the higher the viscosity.

If the original viscosity of the engine oil is relatively low, you can choose the engine oil with high viscosity, and choose the engine oil with high viscosity, which can alleviate the oil loss. However, it is also a symptom rather than a cure, and the overall engine oil has little impact. The engine of the Volkswagen model is equipped with a flaw in the design, so many Volkswagen cars burn engine oil.

Reasons for burning engine oil:

1.Do not do effective cleaning oil circuit for a long time, 2The antifreeze is not replaced in time, 3The oil life cycle is too long.

4.Long-term short-distance driving. The car that burns engine oil must occupy one or all four points. Please be seated.

The solution is Naizai:

Don't worry about burning engine oil, prescribe the right medicine, as long as the carbon deposition problem of the piston snap ring is solved, there is no need for overhaul, and the problem of burning engine oil can be directly repaired. Before burning engine oil, through many understandings, the vehicle was completely solved by using the method of PNF non-destructive repair of burning engine oil.

After the problem of adding 1 liter of engine oil to 1,000 kilometers of silver, after fixing, there is no need to add oil for 5,000 kilometers. At the same time, Changpawang can clean the carbon deposits and colloidal impurities in the oil circuit, and can clean the plugging of the fuel injector and the carbon deposits in the combustion chamber at one time.

As long as the continuous use of PNF non-destructive repair oil repair agent and more driving, the carbon deposits on the top of the piston can be cleaned and the piston ring can be released.

Decrypt the correct inspection methods and repair plans for burning engine oil.