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Q: Why must oil be refined before it it used?
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What is oil called before it is has been refined?

Crude Oil.


Do some cars use crude oil?

No car runs on crude oil. This is the oil that comes out of the ground. It must be refined into gasoline or diesel, at the refinery before it can be sold.


What is oil called before it is cleaned?

If you mean refined, then it's crude oil


Why is oil known as crude oil?

It is knowen as Crude oil before it has been refined... Once it's been refined it can then be called gasoline, petrol, diesel and just "Oil"


What is the oil used in transformers?

Transformer oil is a highly refined mineral oil.


How long does crude take to form compared to regular oil?

Crude oil is regular oil. It is the raw oil extracted from the earth. It is referred to as crude as it must be refined so its components can be used.


What is oil called before its been refined?

Crude oil. and this comes in different grades.


What Is Diesel Used For In Crude Oil?

Diesel isn't used in crude oil it is a refined product of it


Is petroleum used in motor oil?

Yes . . . motor oil IS refined petroleum.


Why does crude oil need to be refined?

Once crude oil is refined there are a variety of marketable products for profit. Crude oil can only be used directly as a fuel in certain steam engines, once refined there are many more options.


Which of the following separation methods is used in refining oil?

Oil is refined by fractional distillation.


What word is the opposite word crude?

Refined .A bit more:Refined could apply to oil and people. Crude oil is oil as it is pumped from the ground, before it's refined and made into gasoline, etc. Crude people are those who are not "refined", as in lacking a certain type of class.