Benefits and Uses of Engine Lubricants in General

Engine lubricants act as a sort of thin, liquid-y layer between moving engine parts. This layer reduces metal-on-metal contact, which 

prevents overall wear and tear and, in turn, increases the engine's lifespan.

Temperature Regulation

Engines generate a lot of heat, especially in parts of the engine where there's a lot of friction, engine lubricants absorb some of this excess heat which would otherwise cause long-term damage, on the flip side, in extremely cold conditions, certain parts of the engine might not work as efficiently (since they rely on internal combustion), engine lubricants also help the engine operate better in those conditions, so to summarize, lubricants help preserve the engine in both extreme heat and cold conditions (synthetic oils are much better at this than mineral ones).

Fuel Efficiency

Engines that are well lubricated generally operate more smoothly, which in turn improves fuel efficiency and overall vehicle performance (the differences can be marginal).

Cleaning

Engines build up small deposits of different contaminants and residues, which, if not left unchecked, will reduce the engine's overall performance and efficiency as well as its health (operational health that is, the engine isn't gonna develop a flu or something), lubricants wash away those pesky deposits and contaminants.

Corrosion Resistance

Metal naturally rusts and corrodes due to oxidation (contact with oxygen), that's why anything that's made out of metal is coated with different substances and chemicals that act as a very thin barrier to prevent the metal from coming into direct contact with oxygen (this applies to everything from kitchenware to industrial steel pipes), the same can also happen to engines, the lubricant acts as that barrier between the metallic parts of an engine and the chemical reactions that can damage it (it's not just oxygen, different chemicals can also cause corroison, silver in particular is very susceptible to Sulfur).

What Separates Quartz GF7 from Other Engine Oils

Age Resistance Technology (ART)

Total Energies has its patented formula for Quartz, featuring their Age Resistance Technology (ART), this technology substantially increases your engine's resistance to oil oxidation and sludge build-up. It also performs exceptionally well in protecting your engine during extreme heat and cold. To get into more precise numbers, Total Energies claims that Quartz with ART has improved sludge build-up protection by 18% and improved protection against mechanical wear by 74%.

Wide Product Range

Total Energies' Quartz has one of the widest product ranges on the market, which includes mineral oils (the conventional kind), synthetic oils, and semi-synthetic oils for combustion, hybrid, and electric engines.

Mineral Oils

Mineral oils are created by refining crude petroleum; they're the typical engine oil that can be found in most vehicles, especially older ones.

Synthetic Oils

Synthetic oils are also based on crude petroleum, however, they undergo heavy chemical modification (down to the altering of its molecular structure), synthetic oils contain fewer impurities than mineral ones, they are also substantially better in almost every way (better protection against wear and friction, better cleaning, better flow and viscosity in cold and hot temperatures, better fuel consumption rate, etc.), the only major disadvantage is that synthetic oils are much more expensive than mineral oils (for them to produce and for you to purchase).