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Anyone who has been to Russian car exhibitions in the recent past must have seen the booth of a well-known company, where a passenger car with the engine
All “magic” oils, or branded additives that turn the lubricant already in your car engine into an analog of the “elixir of life” for the “heart” of the car, contain some molybdenum metal compound. Most often, for such purposes, the compound with sulfur is used – molybdenum disulfide. In appearance, the powder of this substance is very similar to graphite.
The widespread use of molybdenum additives in engine oils began during World War II due to the substance’s ability to “stick” to the surfaces of steel parts, essentially isolating the rubbing parts of the engine from each other. At the same time, their wear almost stops, the compression in the cylinders increases, and some bumps in the “engine” also disappear due to increased wear of moving parts.
For military equipment, such a “skill” was useful in terms of survivability in combat. For example, a plane with a broken oil pipeline did not fall with a stalled engine, but could rumble to its own airport. That is, it is really possible to greatly reduce friction with molybdenum-containing additives. With which you can in fact demonstrate a promotional show with an “engine without oil”.
But molybdenum sulfide has some unpleasant properties. First, when heated, molybdenum forms an oxide that is insoluble in engine oil. All this metal, contained in the “miraculous” oil or in an additive with a similar claimed effect, eventually turns into it. In addition, in a fair amount, an insoluble precipitate is found in the oil long before all the molybdenum in it “burns up”. Yes, the oil filter should solve this problem.
But in practice, insoluble powder is deposited in the bends of oil pipelines, “killing” valve stem seals and leading to other problems. This means that “molybdenum” oil needs to be changed more often. Forget walking 10,000-15,000 miles between them. If you don’t want to ruin the engine beforehand, change this oil every 5000 km. You have a passenger car, not a tank, whose average life on the battlefield is only half an hour, which is why no one thinks about the long-term operation of its engine.
The second minus of “molybdenum” additives appears when they are added to the oil already in the engine. If it contains its own calcium and alkali additives, then molybdenum simply cannot do anything – it will not be able to form a protective film on the metal. But oxidizing during the operation of the device is complete.
So we can say that it makes sense to use “molybdenum” oils or additives only in one case: when you are going to sell a car. And you want to give the impression that she still has the “engine” – wow! Constantly using them in the engine is at least noticeably more expensive than conventional oils. Yes, and it is risky: you can not say in advance how and where the negative from the powder of oxidizing molybdenum will appear in the engine.
All “magic” oils, or branded additives that turn the lubricant already in your car engine into an analog of the “elixir of life” for the “heart” of the car, contain some molybdenum metal compound. Most often, for such purposes, the compound with sulfur is used – molybdenum disulfide. In appearance, the powder of this substance is very similar to graphite.
The widespread use of molybdenum additives in engine oils began during World War II due to the substance’s ability to “stick” to the surfaces of steel parts, essentially isolating the rubbing parts of the engine from each other. At the same time, their wear almost stops, the compression in the cylinders increases, and some bumps in the “engine” also disappear due to increased wear of moving parts.
For military equipment, such a “skill” was useful in terms of survivability in combat. For example, a plane with a broken oil pipeline did not fall with a stalled engine, but could rumble to its own airport. That is, it is really possible to greatly reduce friction with molybdenum-containing additives. With which you can in fact demonstrate a promotional show with an “engine without oil”.
But molybdenum sulfide has some unpleasant properties. First, when heated, molybdenum forms an oxide that is insoluble in engine oil. All this metal, contained in the “miraculous” oil or in an additive with a similar claimed effect, eventually turns into it. In addition, in a fair amount, an insoluble precipitate is found in the oil long before all the molybdenum in it “burns up”. Yes, the oil filter should solve this problem.
But in practice, insoluble powder is deposited in the bends of oil pipelines, “killing” valve stem seals and leading to other problems. This means that “molybdenum” oil needs to be changed more often. Forget walking 10,000-15,000 miles in between. If you don’t want to ruin the engine beforehand, change this oil every 5000 km. You have a passenger car, not a tank, whose average life on the battlefield is only half an hour, which is why no one thinks about the long-term operation of its engine.
The second minus of “molybdenum” additives appears when they are added to the oil already in the engine. If it contains its own calcium and alkali additives, then molybdenum simply cannot do anything – it will not be able to form a protective film on the metal. But oxidizing during the operation of the device is complete.
So we can say that it makes sense to use “molybdenum” oils or additives only in one case: when you are going to sell a car. And you want to give the impression that she still has the “engine” – wow! Constantly using them in the engine is at least noticeably more expensive than conventional oils. Yes, and it is risky: you can not say in advance how and where the negative from the powder of oxidizing molybdenum will appear in the engine.
Source: Avto Vzglyad
Alice Smith is a seasoned journalist and writer for Div Bracket. She has a keen sense of what’s important and is always on top of the latest trends. Alice provides in-depth coverage of the most talked-about news stories, delivering insightful and thought-provoking articles that keep her readers informed and engaged.
