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Information Regarding Motor Oil

More and more, synthetic motor oil seems to be the right choice for today's vehicles.
People are paying so much for cars they need them to run longer and today's cars now have higher performance engines which will run longer when lubricated with quality oil.
In addition, using quality oil also means less frequent oil changes, which means monetary savings for you, the consumer.
So which type of synthetic oil is best? There are three main types of synthetic basestocks which are currently in use with automobiles.
First, there are polyalphaolefins.
While polyalphaolefins have many of the qualities which make synthetic basestocks so appealing (hydrolytic stability, demulsibility), there are drawbacks.
They are not as oxidatively stable as other synthetics, meaning they react with oxygen to produce sludge and other engine deposits.
They also can shrink seals and offer poor solubility-difficulty keeping additives dissolved in the basestock.
Nevertheless, when properly additized and/or blended with a petroleum basestock or another synthetic basestock (generally an ester of some type), these problems can be minimized or nearly eliminated.
The next category of synthetic basestock is diesters.
While diesters avoid some of the problems associated with polyalphaolefins (poor oxidative stability, poor solubility), they do have poor hydrolytic stability, meaning they absorb water, which causes acid build-up and lessens the quality of the basestock.
This is why they are often combined with polyalphaolefins.
Polyol Esters are the next type of synthetic basestock.
These are similar to diesters but offer even better high temperature performance.
However, they also have some of the same problems as diesters.
It is important to remember when considering synthetic motor oils that the oils sold at your local auto parts store as synthetic are actually what the author of the Motor Oil Bible calls "pseudo-synthetic basestocks.
" These are petroleum basestocks that have been put through a super intensive refining process called "hydrocracking.
" This involves changing the molecular structure of the basestock, resulting in a basestock which has many of the qualities of a synthetic basestock, so much so that motor oils made in this way can be legally sold as "synthetic.
" While these outperform traditional petroleum oils, this is something that must be weighed when buying "synthetic" motor oil.
You may want to spend the extra money to get a truly synthetic motor oil.


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