When you go to maintenance, bring your own oil, it is a bit like: my home to decorate, the materials to buy themselves, the master please come over, the price is cheap, not to say, the back of the living themselves may be more satisfactory.
It's cheaper to buy motor oil yourself than it is to buy it in a store
First of all, if you buy your own oil, it will be much cheaper than 4S shops or repair shops, or the same price, performance and quality are much better.
Like some 4S shops, from the perspective of maintenance lists, the price of oil alone may be 500 pieces, 600 pieces, but also additional man-hours.
The same specifications of the oil, online, the official flagship store exactly the same factory brand, the same specifications, maybe 3, 400 can buy back, engage in activities to buy more, maybe the price is lower the possibility.
After all, 4S shops, repair shops, its salary always has to pay, right? Rent always has to be paid, right? Such a big house, the rent can't be 1 yuan, right? In fact, it is calculated into the price of daily operation, and it is also a bit similar to the physical store selling clothes.
Hearing here some friends will say: "Ah, the one sold in the 4S store is the original engine oil, matching it!" A little more expensive, a little more assured! "That's okay, too, right?"
In fact, it is possible that we are thinking a little more, I actually talked about it in the video before, that is, "Does the "original" engine oil really come from the original factory", here is a brief talk.
Most of the automobile manufacturers are not involved in the research and development of motor oil, the so-called "original engine oil", this name is not formal? Where did it come from?
Formal, it refers to the engine oil certified by the automobile manufacturer, generally seen on the bottle, such as "what car group exclusive", "what original engine oil", etc., these are there, but it is not fake.
In fact, the performance gap between this oil and the same level of oil on the market is there, but it is not so large, and the price gap may be even greater.
Of course, you should also pay attention to buying motor oil, if you buy fake, it will be finished, no matter how cheap it is, it is also nonsense, and it is still more important to find trustworthy and official channels.
It can prevent ghosts in the store
In addition to the cheap price, bringing your own oil can also prevent some strange things that appear when you maintain it in the store, which is called "ghosting" in local language.
Auto repair shops that are not particularly regulated may also steal beams and change columns.
For example: what is sold to you is expensive, when you change, give you a cheap, expensive bottle empty, and take it out to show us.
We were over there drinking coffee and nodding our heads, and he made money, even selling fake oil, how can we know? Right?
The Altay Municipal Market Supervision Administration conducted a comprehensive inspection of the city's auto repair shops, car beauty shops and auto supply sales stores in 2021.
As a result, among the more than 70 stores, 15 were suspected of selling counterfeits, and more than 320 bottles of counterfeit and shoddy motor oil were confiscated on the spot, which was not less, right?
The biggest problem with fake oil is not the loss of buying, it is the performance is not up to standard, it is easy to cause these damage to the engine, and it is often irreversible.
It's a bit like: the down jacket worn in winter is fake, and it doesn't matter if it's not warm, in case it's a bit of toxic material, it will have a headache.
Niu Yingwei published a paper in "Automobile Repair and Maintenance", "Those Things That Use "Sub-Factory Parts" (I) - Examples of Failures Caused by Counterfeit and Shoddy Engine Oil and Machine Filters", which was mentioned above.
The car uses fake oil for a long time, and a large amount of sediment may appear in the engine, and the failure level phenomenon that causes serious engine wear, noise, power drop, etc. will occur.
Doesn't it mean that the noise seems to be ringing a little? This is OK, it is possible that different oils are not the same, is the level of failure.
Avoid changing the oil at will
In addition, if you bring your own oil, you can also avoid the master from changing the oil for us at will.
Many times, when the master changes the oil, it may be that he feels that he is very professional, or it may be that he is really a little lazy today and does not want to read the maintenance manual.
It's basically: "Ah" you this 5W-30, "ah" you this 5W-40... That's what I'm saying.
It's like going to a lot of tire shops and you say, "Master, give a breath." "People don't open your fuel tank lid to see how much tire pressure is in the front tire, how much tire pressure is in the rear tire, no.
2.5kg all to play well, the recent days are a little hot, all hit 2.4kg, feel that I have been very professional.
The reason is to do this, most of the models on the market are really such a tire pressure, to say wrong is not necessarily wrong.
Engine oil is also such a problem, generally 5W-30, 5W-40, right? The old car is 5W-40, the new car is 5W-30, and the special new car is either 5W-20, which is the feeling.
It's not easy to get into trouble anyway, at least that's how they feel.
Gong Maoyun, Zhang Yu and others published a paper in the journal "Auto Parts", "The Effect of Fully Synthetic Oil Viscosity on the Performance of Supercharged Engines", which was mentioned.
The higher the viscosity of the oil, the more conducive it is to the formation of the oil film, so that each friction pair is in a good lubrication state.
But at the same time, the higher the viscosity, the worse the fluidity, and the friction loss will increase, which is called "more oil-intensive" in the vernacular.
Hu Jie of Wuhan University of Technology has a master's thesis, you may wish to listen to it, "Research on the Influence of Oil Viscosity on Fuel Consumption under Two Circulating Conditions", the above is an experiment.
Compared with the 30 viscosity contrast oil and the 20 viscosity test oil, the difference in fuel consumption below the NEDC and WLTC cycles is around 1.2% to 1.4%.
Therefore, the manufacturer has also recommended different labels for different needs in the owner's manual.
For example: Toyota Asian Dragon, you can choose 0W-16, 0W-20, 5W-20, 5W-30, 4 different oils according to your own needs, to pursue more fuel saving, the viscosity is lower.
It's a bit like wearing clothes, the big one can definitely wear, suitable for my kind of fat, right?
If you want to show some figure, choose a smaller one, just tighten a little tighter and show more figure! Wear can wear, the warmth effect is the same, the price is similar.
If you bring your own oil, study your own suitable label in advance, and also correspond to the appropriate budget and price, there will be no such thing as changing back and forth, and you must be the first to count in your heart, right?
What if you don't let your own oil
The advantages of bringing your own oil are actually more, and many old driver friends who understand cars basically do this.
But there is a big problem: many times you run to the 4S store, people see that you have a barrel of oil in your hand, he will let you out.
"No, no, we don't dare to do it," you see people say very gently, "we don't dare to use your unknown oil, in case the engine breaks down, we can't take this responsibility." ”
Start scaring people, just anyway... Talk about it, talk about it in the back, talk about it explicitly, talk about it in secret, just don't let you bring it.
At this time, in general, you can come up with local laws and regulations and say that it is allowed, and you can tell him about it. Too lazy to tell him, but also laborious, saying how about winning?
Other reliable auto repair shops or auto shops, changing the oil is really a very basic operation, generally there is no problem, the oil will not be changed, you don't open a store, that's it.
Even like some app above, you can clearly see which auto repair shops are nearby, and many of them can be changed by buying a motor oil by themselves.
If the filter is not matched well, buy one directly in the store, he may be very happy, right?
Therefore, now there are also many shops, you bring your own ingredients, tell him the method of processing, he charges a processing fee for you to burn, in fact, there are also some, many restaurants along the southeast coast have done so.
For consumers, it is possible that the processing fee is 50, 60, and the more expensive store is 100 or 200, right? At least don't earn money for my ingredients.
For this shop, I enter the dish, into the fish, into the meat, put there can not sell out, will be broken, you bring it yourself, am I not also in stock? Everyone was happy.
If you really feel that it is not appropriate or convenient to change outside, you may wish to try to change it yourself, it is not as difficult as you think.
In the past, we also made a video specifically, "How to change the oil yourself", the purpose is not to spend money, do not queue, do not ask for people.
In this video, I actually demonstrated it to all my friends, and each step was clearly explained, and it was basically possible to change it for the first time.
Interested friends may wish to go to see, even if not their own change, you see that the master is not professional! Our process is very strict.
It is better to maintain your own oil, cheaper and more assured
Therefore, in general, when maintaining, it is indeed more ideal to bring your own oil than to buy it in the store, the price is more affordable, and you are more confident and more assured than yourself.
If you encounter a situation where the store does not give a change, you can justifiably ask for it, which is my reasonable need.
Too lazy to talk to him, go outside a few more shops to ask, will not change the oil really do not open a car repair shop, really is the basic operation.
After the first insurance, do you want to continue to go to the 4S shop for maintenance
Of course, the point that everyone is worried about may still be unavoidable, called "quality warranty".
The reason why the store can sell so expensive is that it also uses relatively ordinary motor oil, that is, holding the quality warranty as an arrow to put there.
Which maintenance is done in the 4S shop without warranty? Which maintenance outside the 4S shop must also be warranted? The list is for you to make.
There are so many maintenance items, in addition to those just now, what must be done? What are the situations to be done and what not to do after the inspection? Clearly understand that it does not cost money to raise a car.
Keywords: maintenance
If you want to understand this list and information, it is very simple, just pay attention to my WeChat public account "spare tire car", reply to the keyword "maintenance" can be.
I this public number, every day will give you a piece of car practical small dry goods, text version, audio version, video version are available, pick your favorite version on it, "spare tire said car" waiting for you to play Oh.
bibliography
[1] Strike hard! Altay City has carried out solid work to combat infringement and counterfeit oil. Altay Municipal People's Government
Niu Yingwei. Those things that use "sub-factory parts" (1) - examples of failures caused by counterfeit and shoddy engine oil and machine filter[J].Automobile Repair and Maintenance, 2020.
Gong Maoyun,Zhang Yu,Lou Jianmin,Zang Yungang. Effect of fully synthetic oil viscosity on performance of supercharged engine[J].Auto Parts, 2017.
Hu Jie. Study on the influence of oil viscosity on fuel consumption under two circulating conditions[D].Wuhan University of Technology, 2019.
[5] Toyota Asian Dragon Owner's Manual
[6] Autohome