If you search online how to distinguish the authenticity of engine oil, the most common thing is how to distinguish the authenticity from the packaging. What I want to say here is that although this method has certain reference value, it is also used by many profiteers. I'll do whatever you say is true. The packaging of genuine engine oil is not as good as that of netizens.

Bottle caps, whether real or fake, are now disposable. If you encounter a bottle cap that is not disposable, don't buy it. There is no professionalism in counterfeiting at all.

Weld line, the so-called weld line is the connecting line between two pieces of plastic, usually in the middle of the edge. Now the articles provided on the Internet all say that the genuine products are of good workmanship, the welding wire is smooth, burr-free, and hands are not stuck. I don't know who said this first, but according to our inspection and comparison of a large number of packaged welding wires, it can be said responsibly that there is little difference between the welding wires on the real and fake oil drums, and the welding wires on the genuine oil drums may have burrs and feel stuck, such as the welding wires at the bottom of the newly packaged shell, and may even scratch your hands. Especially, the welding wire burr near the concave part of the bottle mouth is more obvious. Now the fake processing technology is also very good, and the welded seam of the manufactured oil bottle is also very smooth. Therefore, it is not advisable to distinguish the authenticity of welding wire. In addition, the transparent scale line on the real oil package is not necessarily straight. It feels rough at first glance, but it doesn't mean it's a fake.

Self-adhesive trademarks, if compared, can be found that there is still a big difference between true and false self-adhesive: first of all, from the printing point of view, the color of genuine products is more natural, and the color of some imitations is not so natural; Secondly, the original printed fonts are very clear, and some imitation fonts will be a little weak; Finally, the genuine sticker is very close to the bottle. If you look at it carefully or touch it with your hands, you can feel that it is difficult to tear it off, and some fake stickers will feel that they are not tight enough. One thing to emphasize here is that many people on the Internet say that the genuine packaging will be very new and tidy. This is only relative, not all goods are like this. Because it is filled with liquid, there will be a little protrusion in the middle of the bottle, even a protrusion invisible to the naked eye. Oil is usually 6 bottles in a box or 4 bottles in a box, and each bottle is stuck tightly, so it is normal to have wear glue. You can actually go to Taobao. Many sellers actually shoot oil packaging, and the glue has traces of wear. Therefore, when we actually take pictures of oil, it is of little significance to take old and new packaging as the reference standard for authenticity. Now the recycling bottle is also very new. Nowadays, many people look for 4s shops to collect waste oil bottles, and the transaction volume is very large. Oil is directly transferred from the general agent to the 4S shop, and it is directly changed without display. The back of used bottles is well preserved and sold to recyclers, so the circulation link is very short. The packaging of the refilled oil may not be damaged in any way, and it looks newer than the oil sold in many retail stores.

Special signs, there are many articles on the Internet saying that there are many so-called special signs on the oil packaging. Is there such a trace? Indeed, the problem is that there are fakes now, so manufacturers keep changing packaging. Relatively speaking, anti-counterfeiting telephone is the best anti-counterfeiting measure, and there is basically no possibility of fraud (it is said that there was an anti-counterfeiting telephone fraud case in 2003), but there is not much engine oil supporting anti-counterfeiting telephone at present. In August, Shell changed its packaging, and all of them supported anti-counterfeiting telephone inquiries. It turns out that only Hongxi and Huangxi in the old packaging support anti-counterfeiting telephone verification.

Now there is a saying on the Internet that the real engine oil should be 3.9 kg, and the fake engine oil is generally around 3.5 kg (it seems to be Mobil). This is easy to mislead consumers. First of all, the weight of real engine oil and fake engine oil is rarely much different, and the real engine oil is far from 3.9 kg. Usually 3.7 kg is normal.

Generally speaking, it is unscientific to distinguish the authenticity from the outer packaging. Nowadays, the counterfeiting technology is very mature, and the appearance characteristics can be used as an auxiliary reference, but it is far from being a standard for judging the authenticity of engine oil. Now there is another kind of engine oil on the market, which is absolutely genuine from the outer packaging, but the engine oil is fake. This kind of engine oil is to pump the original engine oil near the weld with a needle, then inject the engine oil, and finally seal the pinhole. After completion, there is no abnormality in the outer packaging, but the oil is lost. We have never seen this kind of oil with our own eyes. Because the operation is too complicated, there should not be many in the market, but once it is encountered, it is very difficult to judge the authenticity from the outer packaging. So we suggest that you don't judge the authenticity of a can of engine oil only by its external characteristics.

Oil quality characteristics

The oil itself is easier to distinguish between true and false oil than the appearance. But it's still not easy for beginners to tell. The reason is simple, because novices have not yet got a standard for measuring engine oil. For example, when I say that genuine engine oil generally smells, it's hard to understand what I'm talking about if I don't often smell genuine engine oil. Whether it is genuine or imitation, it is fragrant, but it smells different. It's hard to understand if you don't have regular contact. So is the color. If I say the color is golden and bright, it is difficult to understand what I mean by golden and bright if I don't touch the engine oil often. But in the eyes of an old mechanic, the characteristics of all kinds of engine oil are very obvious, and many people can know at a glance whether it is genuine or not and which brand it is. Novices can't tell the difference between true and false engine oil because there is too little contact and too little. If there is that chance, I believe most people can easily distinguish the true and false engine oil. Next, I will introduce the characteristics of engine oil itself and some misunderstandings about engine oil;

Purity, this is a relatively intuitive criterion, pure is not necessarily genuine, but impure engine oil must not be genuine! This is absolute. Authentic engine oil will not have precipitation and impurities, and will not appear turbidity and floating objects. The engine oil with the above conditions must be fake engine oil, which is the most harmful to the engine.

Color, what color is a good engine oil? Now it is said on the Internet that the real engine oil is lighter in color and the fake engine oil is darker in color. This view is also very wrong. First of all, different brands of engine oil have different colors. For example, Castrol's magnetic protector is darker in color. At present, counterfeit magnetic protectors on the market are lighter in color than genuine ones and look better. Secondly, if the product viscosity is the same, the darker the oil color, the better. Engine oil is made of base oil and several additives. The more high-grade engine oil additives are used, the darker the color will naturally be. Third, the color of oil will change slightly with the change of temperature. Usually the color is darker in summer and lighter in winter. Finally, the oil colors of different manufacturers are different, and the oil colors at home and abroad are also different. I remember that two months earlier, we found a bottle of fake yellow west recently, poured a cup and compared it with the genuine one. It was found that the fake yellow west was obviously dark and blue, and its permeability was poor. It felt a bit like adding a very light blue liquid metal to the engine oil. With regard to color, our task is to firmly remember the color characteristics of various oils, unless we have been in contact for a long time. Otherwise, it is difficult for novices to distinguish the true and false oil by color. Now the recovery and purification process of engine oil is mature, and the purified engine oil has good color and appearance.

Viscosity is also a very important indicator of engine oil. There are different opinions about viscosity on the Internet. Some people say that fake engine oil is more viscous than real engine oil, while others say that fake engine oil is not as viscous as real engine oil. In fact, both opinions are correct. Let's talk about the current situation first. Generally speaking, used engine oil will be thicker, less mobile and even semi-solidified than new engine oil. This is due to the increasing impurities in engine oil and the continuous oxidation of many additives for a long time. The current oil purification process can well remove impurities and add some chemicals to restore the fluidity of oil. However, usually, the purified oil loses its viscosity and feels more like water. If you try with two fingers, you can't draw silk. This oil is definitely unqualified and easy to distinguish. If you want to make this oil less easy to find, counterfeiters will add thickener to it to deceive consumers. The usual method is to add. Why do some people say that too viscous engine oil is also fake engine oil? Because the fluidity of engine oil must be considered in the process of making real engine oil, it is definitely abnormal to be too thick, and recycled oil is often heavy because of poor treatment of oxidized additives. Therefore, the viscosity of genuine engine oil should be moderate. If you twist it by hand, it will be slightly sticky. If you twist it with two fingers and separate it, a small connecting line will appear. This line should not be too thick, otherwise it will be abnormal.

It smells like genuine engine oil is relatively fragrant, but not too strong. Different oils have different smells, similar to car wax. Authentic engine oil is not pungent, and basically has no smell of gasoline and diesel. If there is a strong smell of gasoline and diesel, it can basically be judged that it is purified from waste engine oil.

Others, the above four points are the main features, and there are some other small ways to distinguish them, such as putting the oil in a sealed container and shaking it vigorously for a while, and then standing for a while. If there is stratification or turbidity, it must be fake oil. Others think that the oil that can quickly wipe off the oil film with a little oil on your hand is unqualified oil. I think this method is also reasonable.

Having said that, I hope the new owner can have a general understanding of engine oil. The identification of engine oil is actually a technical activity with certain difficulty. We have called Shell, Mobil, Castrol and other companies many times, hoping that they can have relatively authoritative verification methods, but unfortunately, they all told us that if we want to ensure that we can buy genuine products, we must go to their designated agents to buy them. If we want to distinguish the authenticity of engine oil, we must send them to their designated agents or testing points for free testing. Spoke. Com once again suggests that it is best to buy engine oil in a fixed place. Don't try to change the purchase channel easily. When changing channels, it is best to get the brand agent or designated inspection point to check the authenticity for the first two times.