Author: Brother Car Picker
"Car Pull Lab"
Fans private messages asked me if I could rate the oil, and today it came.
The brother spent a huge amount of money to buy 3 SP grade oils of Meijia Shell.
I hope to pass the following 4 tests to help you choose the engine oil suitable for your car.
(Tips: this article does not have any sponsors ~)
Mobil Speedmaster 2000 SP Class 5W-30, characterized by the containing of fast-growing anti-wear molecules, and has a patented formula, made in China.
Carlsto Super Care SP Class 5W-30, featuring a double-acting cleansing formula that effectively prevents carbon deposits, resists sludge and reduces paint film formation, made in China.
Shell Extraordinary Helix Urban Light & Shadow Edition SP Class 5W-30, characterized by the use of natural gas oil technology, basically free of petroleum impurities at the same time, has a stronger molecular structure, made in China.
First, low temperature fluidity test.
I poured the 3 oils into 3 test tubes, put them in the -18 degree refrigerator for one night, and then poured them out and poured them into three slides with the same slope material to compare the flow speed.
There are slight changes after the 3 oils have been frozen all night, Mobil and Castrol still look relatively clear, while Castrol looks a little cloudy.
Then I poured them into the three slides of the test at the same time, but in the instant of pouring, I saw that the Castrol in the middle was significantly slower to touch the slide, while Mobil and Shell basically touched the slide at the same time.
Then the significance of this experiment is actually relatively simple, that is, in theory, the oil with better low temperature fluidity can reach the part that needs lubrication as quickly as possible at the moment of cold start of the engine, reducing the wear of the engine cold start.
Although the low temperature viscosity of these 3 oils is 5W, theoretically they can ensure that they can maintain fluidity above -30 ° C, so although they have been frozen at -18 ° C, they can certainly still flow.
However, there will be a slight difference in flow rate, and Castrol is obviously inferior to Mobil and Shell in the test.
But the distance between Mobil and Shell cannot be seen in the first half, and in the second half, Shell begins to gradually surpass Mobil, and the distance is getting bigger and bigger.
In the end, Shell took the lead in the slide, followed by Mobil, and Castrol in the middle took a while to slide out of the slide.
conclusion:
The best low temperature fluidity of the 3 engine oils is Shell, Mobil is the second, Anderson flows the slowest, which I think is related to shell oil's natural gas oil production technology.
Second, lubrication anti-wear performance test.
I will use a lubrication anti-wear detector to test the lubrication anti-wear effect of these 3 oils at a fixed speed and the same test time under the same pressure.
The principle of use of the anti-wear detector is that the friction wheel will rub a weight under the lubrication of the oil. And the friction wheel is made harder than the weights, so after 15 minutes of friction, the weight quality is missing.
Finally, by comparing the weight before and after weighing each weight test, the lubrication and anti-wear effect of each machine can be reflected from the side.
For the accuracy of the test results, before each round of testing begins, I use a carburetor cleaner to thoroughly clean the remaining oil in the friction wheel and oil storage pan and dry it completely.
And I will use other oils to heat the detector, so that when the formal test is carried out, I can try to ensure that the temperature of the friction wheel is the same before each test.
Mobil Speedmaster 2000:
Before the test, the temperature of the friction wheel is 19 °C, the initial mass of the weight is 16.520 grams, and the weight is removed after 15 minutes of friction.
It is obvious that there is a trace of friction on the weight, and the mass of the re-weighed weight is 16.500 grams, which is 0.02 grams less than before the test.
Castrol Super Care:
The temperature of the friction wheel before the test was 19.9 °C, which was similar to the temperature of the previous round of Mobil Speedmaster test. The initial weight mass is 16.595 grams, or the weight is removed after 15 minutes of friction.
The wear and tear of the weights looks deeper to the naked eye than the weights of the previous round of testing Mobil Speedmaster. The weight weight after the test was 16.567 grams, which was 0.028 grams less than before the test.
Shell Helix Ultra:
The temperature of the friction wheel before the test was 19 °C, which was almost the same as the first two rounds of testing. The initial weight mass is 16.58 grams, and the weight is still removed after 15 minutes of friction.
The weight quality after the test is 16.523 grams, which is 0.025 grams less than before the test.
Here I will directly put the 3 weights of the test together to compare the friction marks, and they are all magnified with the microscope head.
Shell's Helix Ultra weight is slightly better than The Garsto Ultra On wear marks, but its wear marks edges are a little rougher than Mobil Speedmaster's weights.
The least wear is Mobil Weights, which wears 0.020 grams. It was followed by Shell, which wore out 0.025 grams, and castle the most, which wore out 0.028 grams.
Therefore, the anti-wear effect of this round of Mobil Speedmaster 2000 is the best, which I think is related to the anti-wear factor contained in the selling point of the product itself.
Third, the oil high temperature evaporation test.
High temperature evaporation test, that is, the oil is heated to 250 ° C, and last for 1 hour, and then the initial weight of the oil is subtracted from the evaporated weight, and then divided by the initial weight multiplied by 100%, that is, the evaporation loss percentage of the oil, and according to the API standard, this percentage can not be greater than 15%.
Of course, I can't do the precise variable control in the laboratory, so I plan to use the three methods of fixed initial temperature, fixed heating time, and fixed heating power to test these three oils separately to see which one evaporates less.
Of course, after each heating test, I will do a cooling job on the induction cooker panel and beaker to try to ensure that the initial temperature of each round of experiments is the same.
(This oil heating experiment is very, very dangerous!) Don't imitate, I did this experiment in a fully ventilated position, and prepared a fire extinguisher in advance, because the ignition point of the oil is actually very low, even lower than diesel! ）
I poured about 40 ml of motor oil into the beaker and weighed it together with the beaker and coaster, and its initial mass was 87.459 grams.
The maximum temperature measured by the infrared thermal imager to heat the induction cooker panel is 17.5 °C, and the maximum temperature of the oil is 13.3 °C.
After heating for 15 minutes, the temperature of the oil reaches 204.3 °C, while the temperature of the induction cooker panel is 316.7 °C.
Finally, the weight was re-weighed, or the oil was burned and the mass of the coaster was 87.246 grams, which means that the oil evaporated by 0.213 grams after heating for 15 minutes.
Still pour about 40 ml into the beaker, the quality of the oil plus beaker and coaster before the test is 87.130 grams, the maximum temperature of the heating panel is 17.5 ° C, and the temperature of the oil is 13.8 ° C.
After heating for 15 minutes, the maximum temperature reading of the heated panel is 324.3 °C, and the maximum temperature of the oil is only 184.9 °C.
Finally re-weighed, the oil plus beaker and coaster quality is just 87 grams, which means that the oil evaporated 0.13 grams after heating for 15 minutes.
Also pour about 40 ml of motor oil into the beaker, and the oil plus the beaker and coaster quality is 87.131 grams. The maximum temperature of the front panel of the test is 17.9 °C and the oil is 13 °C.
After heating for 15 minutes, the maximum temperature of the panel is 325.8 °C and the maximum temperature of the oil is 191 °C.
The final weighing oil plus beaker and coaster mass was 86.958 grams, which is 0.173 grams of evaporation of the oil in 15 minutes.
The least evaporated at high temperatures was The Carlsto Super Care, which evaporated only 0.13 grams. It was followed by Shell Helix Extraordinary, which evaporated 0.173 grams. The largest evaporation was Mobil Speedmaster 2000, which evaporated 0.213 grams.
Theoretically, the less the oil evaporates at high temperatures, the less carbon and sludge will be formed by the oil. So I think this has something to do with the selling point of Carlscope's oil's anti-sludge resistance and carbon deposit prevention.
Fourth, metal corrosion resistance test.
I polished an iron plate and cleaned it thoroughly with brake cleaner to divide it into 4 zones.
The first 3 types of oil tested are then applied to the first 3 areas of the iron plate, and then sprayed with water containing industrial salt, which will quickly corrode the surface of the iron products, causing them to rust and oxidize.
Then I came every other day to photograph the rust of the iron plate and spray some salt water until they made a significant difference, so as to compare the corrosion resistance of these 3 oils to the metal surface.
After 24 hours.....
Castrol's rust on the iron plate is a bit worse than that of The American Dress, although Mobil has also rusted under close inspection. If Castrol compares with Shell, shell side rust will be more serious. The metal surface, which is completely unprotected by oil, has formed large rust spots.
In order to make their effect more obvious, I continued to spray salt water on the surface of the iron plate, and then waited for another 24 hours...
It is obvious that the surface of the metal without oil protection has rusted to the point of blackening. Mobil rusted slightly better, a little more rusty than the day before. Castrol and Shell are the most rusty, almost the entire piece of rust.
Mobil Speedmaster 2000 has the best rust resistance in comparison, and Castrol Super Protection and Shell Super Helix anti-rust effect are not satisfactory.
Of course, the significance of this experiment is actually only to test whether the oil film of the oil can protect the interior of the engine as much as possible after the vehicle has been added to the oil for a long time.
But the interior of the engine certainly doesn't form a large area of rust like we just experimented with, after all, we have sprayed salt water.
summary:
If you use a car with a relatively low ambient temperature, you can choose Shell, because its natural gas-to-oil technology should be able to bring better low temperature flow performance.
If you want the engine to have a better anti-wear and lubrication effect, then you can choose Mobil, which claims to contain body shaping anti-film molecules, from the test point of view, it does have a better lubrication and anti-wear effect.
If you want your engine to have less carbon and sludge, then you can try Castrol Super Shield, which has a certain advantage in resisting carbon deposition and sludge.
Of course, the few tests I did are just a simple rough comparison, just for your reference.
If you want more accurate and professional data, you can check the test data of each oil published in its own official channels and published by third-party professional testing agencies.
I think any oil manufacturer has the obligation to provide consumers with more accurate and real product test data to facilitate everyone's purchase and comparison!
If this article is useful to you, then at least convert it and share it with your friends, first help me like it. If you want to see me do more test videos on auto supplies or oil, then pay attention to the car master brother every Wednesday and Friday update, we will see you next time, bye-bye~