Questions and answers

What is hydrocracked oil?  

Hydrocracking is one of the fastest growing divisions in oil processing. Over the past 20 years hydrocracking capacities in the world increased 4 times and reached nearly 250 million. m3 feedstock per year. The process allows by way of selecting suitable catalysts and process parameters to obtain a high yield of the oil components which have a high viscosity index and possess antioxidant resistance. In hydrocracking compounds of sulfur, nitrogen and other compositions are removed. At the same time the processes of hydrogenation of polycyclicaromatics, the splitting of naphthenic rings, destruction of long paraffin chains and product isomerization take place.

In other words, hydrocracking is a process of mineral base oils modification which allows to get the feedstock similar in quality to synthetic base oils.

What is the difference between “gas” and “diesel” engine oil?  

The difference is in the additives package.  It should be noted that most of the modern engine oils are made so that they can be used both in gas and diesel engines.  The oils which are used only in diesel engines are applicable as a rule only in commercial vehicles. In choosing the oil type pay attention to API index the first letter of which refers to the operation field: S-service (oils for gas engines), C-commercial (oils for commercial vehicles).

Should I warm up the engine before driving?  

This question is directly connected to what engine oil you use. It is important to look after that the oil which you use should have the appropriate viscosity index.

Now let’s consider this question from two standpoints.

Technically

Technically, warming up is necessary. It enables engine oil to acquire its operational characteristics which in its turn ensures proper work of the engine.

Ecologically

At the time of warming the engine the amount of toxic volatile compounds is quite essential which damages the environment. It is caused by the fact that at the cold start the concentrated fuel mixture gets in the combustions chamber which increases the amount of combustion products while the catalyst which neutralizes toxic emissions is effective only after the normal operation temperature is reached which takes a while.

Proceeding from the above we cannot come to a certain conclusion in this question.

So, it’s up to you to decide whether to warm the engine or not before driving with an account of your personal civic stance.