Why is it better to bring your own oil when maintaining?

Why is it better to bring your own oil when maintaining?

You go to do maintenance and bring your own oil, which is a bit like: my home needs to be renovated, and the materials are bought by yourself, so please ask the master. Not to mention the cheap price, living behind you may be more satisfying.

It's cheaper to buy engine oil yourself than in the store.

First of all, if you buy oil yourself, it will be much cheaper than buying it in a 4S shop or a repair shop, or the same price, performance and quality are much better.

Like some 4S stores, from the maintenance list, the price of oil alone may be 500 yuan or 600 yuan, and extra working hours are needed.

Oil of the same specification, online, official flagship stores are all the same brand, the same specification, maybe you can buy it back at 3 or 400, and you can buy more for activities, maybe the price is lower.

After all, 4S shops and repair shops always have to pay their wages, right? You have to pay the rent, right? The rent for such a big house can't be 1 yuan, can it? In fact, it has to be included in the daily operating price, which is a bit like selling clothes in a physical store.

Hearing this, some friends will say, "Ah, the original engine oil is sold in the 4S shop, which is very suitable! Be more expensive and rest assured! " Are you ok?

In fact, it may be that we think a little too much. The previous video actually said, "Is the original engine oil really original?" Let me briefly talk about it here.

Most automobile manufacturers are not involved in the research and development of engine oil. Is the so-called "original engine oil" a formal term? Where did it come from?

Regular refers to the engine oil that has passed the automobile manufacturer's certification, which is generally seen on the bottle, such as "what automobile group is exclusive" and "what original engine oil". These are all there, but they are not fake.

In fact, there is a performance gap between this kind of engine oil and the same grade engine oil on the market, but it is not that big, and the price gap may be even bigger.

Of course, you should also pay attention to buying oil yourself. Just buy a fake one. No matter how cheap it is, it's bullshit. It is more important to find reliable official channels.

It can prevent the store from cheating.

Besides being cheap, bringing your own engine oil can also prevent some strange things from happening during maintenance in the store, which is called "cheating" in the local dialect.

A garage that is not particularly standardized may also steal columns.

For example, what I sell you is expensive. When I exchange it, I will give you a cheap one. This expensive bottle is empty. Show it to us.

We nodded over there drinking coffee. He made money and even sold fake engine oil. How can we know? Right?

202 1, Altay Municipal Market Supervision Administration conducted a comprehensive inspection of the city's auto repair shops, auto beauty shops and auto accessories sales shops.

Results Among more than 70 stores, 15 was suspected of selling fakes, and more than 320 bottles of fake and shoddy engine oil were confiscated at the scene, which was not too little, was it?

The biggest problem of fake engine oil is not that it is bought at a loss, but that its performance is not up to standard, which easily leads to these injuries to the engine and is often irreversible.

It's a bit like: the down jacket worn in winter is fake, so forget it if you don't keep warm. In case it is a little toxic, you will have a headache.

Niu published a paper on "Automobile Repair and Maintenance" (1) —— Examples of faults caused by fake and inferior engine oil and mechanical filter, which was mentioned above.

If the automobile uses fake engine oil for a long time, there may be a lot of deposits in the engine, which will cause serious engine wear, loud noise, power decline and other fault levels.

Didn't you say the noise seemed a little loud? It doesn't matter. It may be different from different oils, and it is a fault level.

Avoid the master changing the oil at will.

In addition, if you bring your own oil, you can avoid the master changing the oil for us at will.

Many times, the master may feel professional when changing the oil, or he may be really lazy today and don't want to read the maintenance manual.

Basically, it is: "Ah" you 5W-30, "Ah" you 5W-40 ... that is directly specified.

It's like going to a lot of tire shops, and you say, "Master, make a gas." People won't open your gas tank cover. Look at the front tire pressure and the rear tire pressure. There is no such thing.

2.5kg was given in full. It's a little hot recently, so I gave 2.4kg. I feel like a professional.

The reason for doing this is because most models on the market really have such a tire pressure, and it is not necessarily wrong to say wrong.

The same is true for engine oil, usually 5W-30, 5W-40, right? Old car 5W-40, new car 5W-30, special new car 5W-20. That's the feeling.

It's not easy to have an accident anyway, at least they think so.

Gong Maoyun, Zhang Yu and others published a paper "The Influence of Full synthetic engine oil Viscosity on the Performance of Turbocharged Engine" in Auto Parts magazine, which mentioned this point.

The higher the viscosity of engine oil, the more favorable it is for the formation of oil film, which can make each friction pair in a good lubrication state.

But at the same time, the higher the viscosity, the worse the fluidity and the higher the friction loss, which is called "more fuel consumption" in vernacular Chinese.

Hu Jie of Wuhan University of Technology has a master's thesis, so I might as well listen to it. The research on the influence of oil viscosity on oil consumption under two cycle conditions is an experiment.

Compared with the test oil with viscosity of 20, the fuel consumption difference between NEDC and WLTC cycles is about 65438 0.2% to 65438 0.4%.

Therefore, manufacturers also recommend different labels for different needs in the user manual.

For example, Toyota Asian Dragon, you can choose 0W- 16, 0W-20, 5W-20 and 5W-30 according to your own needs. If you want to save fuel, you should choose a lower viscosity.

Kind of like getting dressed. I'm sure I can wear a bigger size, which is suitable for a fat person like me, right?

If you want to show your figure, choose a smaller one, which will make you tighter and show your figure! You can wear it, it has the same warm effect and the price is similar.

If you bring your own engine oil, you should study your own suitable label in advance, and it also corresponds to the appropriate budget and price, so there will be no replacement. You must have the number 1 in mind, right?

What should I do if I don't let my oil?

The benefits of bringing your own engine oil are actually quite many. Many old drivers and friends who know cars basically do this.

But there is a big problem: many times, when you go to a 4S store, people see you with a bucket of oil in your hand, and he will let you out.

"No, no, we dare not do it." You see what people say is elegant. "We dare not use your oil of unknown origin. If the engine breaks down, we can't take this responsibility. "

I started to scare people, but anyway ... I just said, backwards, openly and secretly, but I just wouldn't let you bring it.

At this time, generally speaking, you can take out local laws and regulations and say that they are allowed. You can talk to him. I'm too lazy to tell him. It's too hard. What if you win?

In other reliable auto repair shops or auto beauty shops, changing oil is really a very basic operation. Generally, there is no problem and the oil will not be changed. Don't open a shop. That's what happened.

Even on some apps, you can clearly see which auto repair shops are nearby, many of which can be changed by buying oil yourself.

If the machine filter doesn't match well, buy one in the store. He may be happy, right?

Therefore, there are many shops now. Bring your own ingredients and tell him how to process them. He charged you for burning. In fact, there are some restaurants on the southeast coast.

For consumers, it is possible that the processing fee is fifty or sixty, and the more expensive store is 100 or 200, right? At least you don't have to make money from my ingredients.

I eat vegetables, fish and meat for this shop, but I can't sell them there. It will break. You bring it yourself, so I don't have it in stock. Everyone is very happy.

If you really think it is inappropriate and inconvenient to change it outside, you might as well try to change it yourself. It's not as difficult as you think.

Interested friends might as well try, even if they don't change. See if the master is professional! The process is very strict.

It is better, cheaper and safer to maintain the oil yourself.

So in general, it is indeed a more ideal choice to bring your own engine oil when maintaining it than to go to the store to buy it. The price is also more affordable, more confident and more assured than yourself.

If the store does not change, you can make a request in good faith, which is my reasonable appeal.

I'm too lazy to talk to him. I'll go outside and ask more shops. I really don't want to open an auto repair shop without changing the oil. It's really a basic operation.